Erin and Mark seem to have it all: he's a successful banker, she's a documentary filmmaker on the brink of a professional breakthrough; they're young and in love, about to embark on their dream honeymoon to Bora Bora. But when, after a blissful day of scuba diving, they discover a mysterious bag filled with incalculable riches, their subsequent choices trigger a sequence of events that will change their lives, and their marriage, forever.