Jenna Garvey, an emotionally troubled teacher with a chaotic private life seeks to numb her pain with alcohol and promiscuity, leading her to be accused of sleeping with a student.
Teacher Dani is drawn into an impulsive affair with a colleague. When a pupil goes missing on a trip, things take a sinister turn - and as she is forced to lie, her life falls to pieces.
Following a confrontation, teacher Helen Simpson detains pupils Cressida and Dee after school. But an altercation between them will have profound and lasting consequences.
As Helen grapples with the news of Dee's suicide, she finds herself trapped in a pressure cooker as Cressida makes a move to destroy Helen's reputation for good.
After an onslaught of online media abuse, Helen makes a discovery when she investigates Cressida's family background. Meanwhile, Sam becomes ensnared in Cressida's web, embarking on a dark path.
In the drama's gripping conclusion, Helen frantically searches for clues about her son's whereabouts. In a final desperate bid to save Sam, she races into the Peak District to confront Cressida.