On an otherwise ordinary day, 26-year-old American expat Adelaide Williams walks into a London hospital and asks for help. Something's not right. She doesn't feel like herself any more. For the past year, she's been dating Rory Hughes, the charming man she met when she was least expecting to fall in love. Does he respond to texts? Honour his commitments? Make advance plans? Sometimes, rarely, and no, not at all. Despite everything, Adelaide is convinced he's The One. But when tragedy strikes unexpectedly, their relationship crumbles, and Adelaide realises she doesn't want to live without him. Because how can you move on from a love that's changed you forever?