At twenty-one, Bree Mead returns to London after a year travelling the world, transformed, confident, and ready for a fresh start. Moving in with her sister Beth, she wasn't expecting to catch the attention of Beth's best friend, Leah Williamson. The attraction is instant, impossible, and absolutely forbidden. As Bree navigates new friendships, jealous enemies, and her growing feelings for Leah, she must decide if risking everything is worth crossing the one line she shouldn't.