In the late 1800s in New England, Ephraim Winslow (Robert Pattinson, The Lost City of Z) arrives at a remote island for a month-long stint working with a crotchety but far more experienced lighthouse keeper Thomas Wake (Willem Dafoe, Platoon). The two have . . . personality conflicts, to put it mildly, but once a massive storm traps them on the island, Winslow and Wake go a little stir-crazy. Complications ensue.