In the fall of 2018, the 26-year-old American missionary traveled to a remote speck of sand and jungle in the Indian Ocean, attempting to convert one of the planet's last uncontacted tribes to Christianity. The islanders killed him, and Chau was pilloried around the world as a deluded Christian supremacist who deserved to die. Alex Perry pieces together the life and death of a young adventurer driven to extremes by unshakable faith.