Celia has dreams. She dreams of going to Seoul for a scholarship she never took, of leaving everything behind and moving to New York. In all those dreams, she finds herself attached to Benedict, the boy she always loved, who didn't love her back. Ben believes in parallel worlds. Worlds where things you didn't do come true-worlds where he went to London and fell in love with Celia, where he shows up on the day she needed him the most. He believes that dreams are glimpses into that parallel world, and it's not a coincidence that Celia's been having them too. It's the day of Ben's wedding, in...