When veteran detective Danny Frater turns up at a hospital mortuary for what he thinks is a routine ID check, he gets a devastating shock. The deceased - a young woman - turns out to be his estranged daughter, Christina. According to the post-mortem report, she's taken her own life. Although the pathologist, Jackie Sowden, insists that the evidence points overwhelmingly toward suicide, Danny refuses to accept her findings, and he forces Jackie to take him through her examination step-by-step.