Tessa has just months to live. Fighting back against hospital visits, endless tests, drugs with excruciating side-effects, Tessa compiles a list. It's her To Do Before I Die list. And number one is Sex. Released from the constraints of normal life, Tessa tastes new experiences to make her feel alive while her failing body struggles to keep up. Tessa's feelings, her relationships with her father and brother, her estranged mother, her best friend, and her new boyfriend, all are painfully crystallised in the precious weeks before Tessa's time finally runs out.