Cass and Loll used to be inseparable. They met at university and they made sense, like two halves of a whole. They had planned their lives around each other, writing down their dreams in The Big Book of Our Life – the things they wanted to achieve, the places they’d go after they finished university. But then one night changed everything.
Seven years later, Loll receives a letter from her old friend. The coming year will be the year they both turn 30, but Loll might be making it to 30 alone. Cass has cancer. Loll had believed she would have her whole life to come to terms with Cass’ betrayal, but time is running out. Cass’ final wish is to complete The Big Book of Our Life, but has enough time passed to heal old wounds?