A famous author goes on a cruise trip with her friends and nephew in an effort to find fun and happiness while she comes to terms with her troubled past.

Gretta (Keira Knightley) and her long-time boyfriend Dave (Adam Levine) are college sweethearts and songwriting partners who decamp for New York when he lands a deal with a major label. But the trappings of his new-found fame soon tempt Dave to stray, and a reeling, lovelorn Gretta is left on her own. Her world takes a turn for the better when Dan (Mark Ruffalo), a disgraced record-label exec, stumbles upon her performing on an East Village stage and is immediately captivated by her raw talent....

Halley is a young high school student who is disillusioned with love after seeing the many dysfunctional relationships around her. Her parents are now divorced and her father has a new young girlfriend she doesn't care for too much. Her mother is now always alone; and her sister is so overwhelmed by her upcoming wedding that she barely leaves the house anymore. On top of that, the shallowness of all the girls and guys at her school convinces Halley that finding true love is impossible. A tragic...