When his teenage daughter doesn't return home after a party, Tom Delaney anxiously combs the neighbourhood and learns that her boyfriend is also missing.

Fearing a friend was involved in Jenny's disappearance, Tom enlists Sophie's help. Meanwhile, Emma investigates disturbing allegations about a teacher.

An anonymous tip leads to a frenzied chase and another puzzling clue. Zoe draws up a list of grudges, and Tom glimpses a side of Rachel he never knew.

While Tom follows a new lead about Jenny, Sophie and Emma deliver devastating news. The Marshalls struggle to keep their cool.

In the wake of a dangerous confrontation, Sophie warns Tom to stay out of the investigation. Tom learns that Jenny was hiding a secret.

As a deadly fire rages, Tom frantically tracks Jenny's phone. More details about Chris' death emerge, and a confession tears a family apart.