Baker (Matthew McConaughey) is a fishing captain who lives on a calm seashore and leads a regular and repetitive life every day. Baker once had a failed marriage. To this day, this marriage is still like a dark cloud hanging over his head. He has never been able to forget his ex-wife Karen (Anne Hathaway). What Baker didn't expect was that one day, Karen, who he had been thinking about day and night, actually appeared in front of him. However, Karen made a request that surprised Baker, that is, to entrust Baker to kill her current husband Frank (Jason Clarke). It turned out that Frank was a man with a bad temper and Karen couldn't stand the life of being oppressed every day, so she took this desperate measure. Faced with the tearful request of his ex-wife, what answer would Baker make?