WPC 56 Gina Dawson is the first woman police constable to serve in her West Midlands hometown in 1956. Determined to prove her mettle, WPC Dawson's resolve is tested on her first day when she encounters thieves, runaways, neglected children and a Brinford branding. Meanwhile, Brinford Police Station is rocked by a shocking discovery in an abandoned mine and DI Burns and SGT Fenton investigate a serious attack on a young woman.

When another woman is attacked in Victoria Park, Gina risks her career to prove Donald's innocence, Jack discovers some interesting information about the missing boys case and Pratt has some problems with a boy of his own.

Despite Fenton's threat, Gina cannot ignore some new evidence and she risks all in making one last attempt to prove Donald's innocence. As William Parker is laid to rest, a troubled Jack has a new suspect and an attack at the cafe leaves an officer's life in danger.

The mystery deepens as Jack gets closer to finding the other missing boy and the hunt for Eddie's attacker compromises Pratt's relationship with his son, and the rapist strikes again but this time with deadly consequences. Elsewhere, trouble at home pushes Gina and Jack closer together, but can she jeopardise everything she has worked for?

Gina's life is put in mortal danger when an attempt to lure the killer takes a deadly twist. Meanwhile, Jack makes a horrifying discovery about the killer's past, but can he get to Gina in time?

The travelling fair comes to Brinford and the search for a runaway girl draws WPC Gina Dawson into a feud between the fair workers and a gang of Teddy boys.