Keane and Cryer investigate when an escaped dog causes a road traffic accident. Keane finds the dog's owner, an elderly gentleman, knocked black and blue on his living room floor. He claims that his injuries where sustained during a fall, but Cryer isn't so sure, and suspects the man's son, who lives with him, may be abusing his father. After the elderly man trashes an estate agent, the truth about the abuse is uncovered.
