How can you ever live up to the memory of someone you hardly remember? Annie is five when her sister Gemma leaves for school one day and never returns. The family's lives are changed forever with Gemma's disappearance and Annie feels neglected and unloved. When she is just sixteen, she decides she can no longer live in the shadow of her perfect but absent sister and she leaves home, falling in and out of jobs and relationships, her resentment for Gemma always there, bubbling under the surface. Many years later she reluctantly returns home to care for her mother, ill with cancer. Her anger only grows when she sees Gemma's room still kept as a shrine while hers is now her mother's sewing room, but as she cares for her mum she begins to soften and egged on by her best friend Priti she realises she has to uncover what happened to Gemma, for all their sakes. Her research puts her in danger but with the help of a fabulous cast of characters and a satisfying twist in the tale, she finally discovers the truth - but can she ever accept it?