The May Do Building is on fire; heavy smoke overcasts the whole building. Firemen, TIN, MING, FUNG and HING receive the mission to put out the fire immediately. In the mission, MING, TIN and FUNG trap in the fire after a sudden explosion of the lift….

Senior Fireman, MING supervises TIN and others to search and rescue the victims on the cruise. When TIN opens a wardrobe in room 304, a large explosion occurs at the corridor, TIN runs away immediately. Due to the flame of fire, MING hides up in a room and discovers a wounded man there. Therefore, he carries him to runaway at the pipe. On the other hand, TIN loses contact with his crew at the fire scene…

A child sees his father passes away in the car accident. However, YEE does not comfort him but turns away to rescue other casualties continuously. TIN dissatisfies her cruelty and argues bitterly with YEE.

The injured woman is screaming for her pain severely. Her grief triggers the pain of TIN at heart and recalls his memories of his wife. The wife of TIN dies in a car accident. Apart, a man is trapped in a fire and calls 999 to seek for help. YOUNG receives this emergency call while she is on duty at the control room. She informs and analysis the situation to MING immediately.

YEE is very angry and dissatisfied with TIN. The appointment ends sadly. On the other hand, MING is unhappy that WAI invites many indecent friends to his house. TIN joins the diving team and starts his lesson. Without interest, TIN behaves loose and inattentive. Therefore, the coach requests TIN to dive deep into the sea and release his pressure. But, TIN dives into the sea and cleans up the cabbage instead.

YIU neglects TIN and talks to FUNG over the phone though FUNG is on duty at the fire station. Hence, TIN goes for walk with despair. He meets YEE by chance, who forgets to bring her key home. He goes up to say hello to YEE, but YEE teases him instead. TIN is too bore; therefore, finds YEE as accompany and shares his sorrow.

Accidentally, YIU discovers that TIN has failed in the examination. She tends to find TIN at the fire service station and asks him the reason; however, TIN has a mission and is not in the fire service station. A child is naughty and trapped himself in the bamboo fence. MING receives this emergency call and set off for the rescue.

WAI follows MING and tends to pacify him. However, MING rebukes him for usurping his harmony life with AH. Though WAI disagrees with his accusation, he tries to explain and speak out the feelings of AH towards MING. MING realises his reckless and carelessness and follows WAI home. They cheer and have a wonderful dinner together.

Because TIN has offended Mrs. Ho, no one takes care YIU then. TIN asks uncle CHE to look after YIU at his restaurant temporarily. But when YEE hears it, she strongly objects to the reckless decision of TIN. Due to the environment of the restaurant, YEE finds that it is dangerous and unsuitable to let YIU stays there. Therefore, TIN comes up an idea and asks YEE to take care of YIU temporarily.

FUNG and other kung fu fellows invite YOUNG to have dinner. Their attention is to rebuke YOUNG for selling out the kung fu lodging and they tend to purchase and preserve the lodging instead. However, YOUNG refuses to sell the lodging to them.

HING is appointed as the leader and takes up the role to in charge the fire security on cruise. However, his subordinate, YAM is dissatisfied with this arrangement and does not respect him. Apart, YIN visits TIN and feels sour at heart, when he finds out TIN and YEE live harmony together like a family.

HING puts out a fire at a hulk; moreover, he rescues a sailor according to the stain of water. Besides, LIN remembers that she is a secret admirer of MING, when she was a primary student. Owing to MING is married, she feels inconvenient to recognise him now.

YEE teases TIN when she rides the mini bus with him together. TIN explains that it was just an accident for him to meet the robbery, while he was on duty. But when TIN wants to talk about his brother, HING; YEE falls asleep on the shoulder of TIN. Though YEE misses the chance to hear about the history of her first love, she warms the heart of TIN accidentally.

The ex-boyfriend of LIN treats LIN to make up with him by committing suicide. On the other hand, MING rebukes AH for using the cake to bribe his colleagues at the fire station. He drives away AH in anger. AH feels innocent and quarrels with MING.

YEE is overwhelmed when HING dates her for the first time. Apart, there is a serious accident happened in an industry. A worker is hurt and trapped by a large machine. MING aware to the emergency and asks TIN and his subordinates to lift up the machine in order to save the worker. However, due to the limited strength of TIN, he nearly slips and hurts FUNG and the worker.

The kung fu fellows misunderstand that FUNG is a paramour; when they discover FUNG is having a love affair with YOUNG. They tight up FUNG and tend to discipline him with the family rules. However, YOUNG commits herself as a wanton woman and requests to be disciplined also. At last, her boldness and true love frightens the fellows to release FUNG immediately.

MING blames TIN for violating his order and rescued people without prior notice. However, TIN disagrees with his accusation and believes that MING is pinpoint at him on purpose. TIN does not want to be a nail in the eye of MING and requests a transfer also.

A fire occurs in a studio. When MING and his subordinates have exited all the casualties, one of the subordinates, a chain entangles KWONG. Thus, KWONG is hanging at the roof of the studio dangerously. MING orders TIN to use the electrical scissors to cut off the chain; however, the scissors is out of order. Afterwards, MING rebukes TIN and KUNG severely for their carelessness on the checking of fire appliances. TIN tends to defence for KUNG and quarrels with MING again.

KUNG worries that the senior management will investigate the accident happened to KWONG; therefore, he confesses to TIN for his carelessness. On the other hand, MING visits AH and tends to make up with her. However, AH drives him away harshly.

YEE cannot the common interest with the old classmates of HING. She makes up an excuse and declines in participating the gathering with HING. Apart, FANNY recognises YEE had injured her father in a robbery of a 24-hour store years ago. She blackmails YEE to lend her money then.

FUNG neglects the advice of TIN and climbs up the bamboo fence to save the illegal worker. TIN aware that the fence is going to collapse. In spite of danger, he tightens the strings and assists FUNG to land on the ground.

A careless worker clamps his hand in a machine. When MING is breaking up the machine, he overhears the conversation between the worker and his wife. The conversation might be irrelevant, but MING is inspired. On the other hand, FUNG and KUNG succeed in help a pregnant woman to deliver her baby at a backdoor of a building.

YOUNG suggests AH making up with MING and invites her to send her wedding invitation to MING. Coincidentally, LIN is at the apartment of MING; therefore, he feels inconvenient to let AH comes into his house. AH feels desperate and suspects MING has hidden a woman in his house. She requests a divorce finally.

MING and AH sign their divorce agreement unwillingly. On the other hand, when YEE discovers the reason for TAT does not testify her; she feels guiltier. Meanwhile, TAT advises HING to forget the fault of YEE and continue the relationship with her.

YAM is transferred to work in Baguio Villa fire station. Meanwhile, MING recommends TIN to take the examination for promotion. TIN is overwhelmed and would like to share his happiness with YEE immediately. However, YEE is worrying about her relationship with HING and has no interest to listen to TIN.

TIN rebukes HING for not taking the relationship with YEE seriously. But HING censures TIN with anger. Actually, HING also decides to break up with YEE; however, he changes his mind when he knows that TIN is in love with YEE.

LEE misunderstands that HING and LAN are lovers. Hence, LEE sends two tickets to HING in order to invite them to attend a charity party. Because of vanity, HING wants to build up a close relationship with LEE and goes after LAN. He starts dating LAN and lies to her that he has been single for a long time.

Because of love, TIN prepares cereal for YEE. However, YEE has no intention to develop further relationship with TIN and she is afraid to cause misunderstands. Therefore, she decides to keep a distance with him.

Finally, LIN dares to tell AH about her relationship with MING. Besides, LAN wants SHAN to forgive YAM and cheats SHAN that YAM has cancer. SHAN believes her words and brings the Chinese herbs to YAM.

The May Do Mansion is on fire. MING, HING and others are ordered to extinguish the fire at once. They divide into 2-rescue teams lead by MING and HING respectively. MING supervises TIN and his subordinates to take the stairs; whilst, HING orders his colleagues, MIKE, to take the elevator.