2008 – a glorious May bank holiday weekend. A four year old boy goes missing after a neighbourhood barbecue. Believed to have been abducted, a nationwide search and media frenzy ensue, but the boy is never found.

As Maggie and her team dig deeper into Callum Reid’s disappearance, they re-interview the Reids and their neighbours, forcing them to reopen old wounds and revisit painful memories, as they find themselves once again under suspicion.

Under pressure to charge her prime suspect, Maggie's still not convinced they've found the killer. However, she's taken aback to discover that her stalker had close links to the Reid family.