Brilliant scientific researcher Tilda Mosse wakes up in hospital unable to speak or move and with no recollection of what happened to her. Determined to find answers and prove she is not in a persistent vegetative state, she travels back through her fractured memories looking for clues. Could someone really have tried to kill her? A debt-ridden younger brother, an over-helpful flatmate, jealous colleagues and a missing lover. Everyone has a motive. On the edge of death, and questioning the value of her life, Tilda’s only hope is to unlock the key of all unknown.