A budding stand-up comic, Juno is voluptuous, hedonistic, funny and terminally untidy. On her thirtieth birthday, she decides to have a wild one-night-stand to mark the occasion. But seducing her new flatmate before he's had a chance to unpack his belongings is not a wise move. Just over from New York, Jay Mulligan is intense, mysterious and, as Juno joyously discovers, far better than breakfast in bed. It's only when they both get out of that bed on the wrong side three days later that the problems start ...