Left to pick up the pieces, Rigby Grey decides to go on her honeymoon with her best friend Zach after being left standing at the altar. But you know what they say...never go on a honeymoon with your best guy friend and not expect something to happen. Two days of wild fun to wipe away the sorrows was desperately what she needed. Waking with a ring on her finger and a marriage license in a coat pocket-was not. Desperate to figure out where the night went wrong, or very right, Rigby and Zach have to decide if their unexpected 'I do's' will go, or if they will become each other's Number One.