The Vanishing (2019)

A team of three men arrive at an island lighthouse to serve their weeks-long shift as keepers. Their isolation is increased due to the fact that their "outbound" calls can't be heard from their broken radio. When they discover a damaged lifeboat with a body and locked trunk nearby, they disagree about how to handle things -- a stress that is only increased when other men come searching for their missing crewmate and the trunk.

Though it's extremely well-acted (I seriously had no idea that Gerard Butler had any chops), it did seem like the descent into madness happened far too quickly for one of them. But, what do I know. Between this and "The Lighthouse," maybe the truth is that keepers are on the brink of madness always? 

C+