I START COUNTING

Wynne Kinch, an adopted 14-year-old girl, has a crush on her 32-year-old stepbrother, George. While spying on George in the bathroom, Wynne notices he has several scratches on his back, and finds a jumper she made for him thrown in the rubbish, with blood on it; this leads her to suspect him of being the serial killer of several local teenage girls, who is still at large. Despite this belief, Wynne continues to have romantic sexual fantasies about George, and dreams of marrying him when she comes of legal age.

Throughout the film, she regularly visits the house she previously lived in with her adoptive family.

Later on, Wynne searches the back of George's van, hoping to find clues but is forced to stay inside and hide when he gets in and drives off. He drives to a house and Wynne discovers that he is having an affair with a mentally unstable woman, whose blood was on the discarded jumper after she had slashed her wrists in a suicide attempt.

Wynne's best friend Corinne teases her about her crush on George and when the family goes out on a picnic, Corinne flirts with him; he gets angry at her for acting like a "pathetic little mini-tart" and pins her down roughly on the ground. Corinne runs off and later phones Wynne to tell her she will stay out all night with an unnamed boy who, she says, they both know. Wynne, worried about her friend, goes searching for her at her former home and finds Corinne's dead body. About to leave the house she is confronted and trapped inside by the bus conductor who Wynne and Corinne often meet on the bus. He confesses to having killed the girls. Wynne tries to escape. He chases her and she falls into the pond. While helping her out he breaks down in distress, at which point the police arrive.

The film ends with Wynne and George watching their old house being demolished.

The true killer is revealed to be the bus conductor, not George. The film ends with Wynne and George watching their former home being demolished.

The climax unravels Wynne’s suspicions and fears, exposing the dangers of projection and adolescent confusion. By revealing the real murderer and closing with the destruction of the family home, the film underscores themes of lost innocence, the unreliable nature of perception, and the end of childhood—layered atop its psychological tension.