This sounds like a thrilling premise for a story! A suspenseful and psychological horror narrative could really amplify the tension between the young missionaries’ faith and their encounter with Mr. Reed’s sinister intentions. The missionaries' beliefs and resilience could be tested as they navigate a maze of fear, forced to rely on their wits and faith to survive. The character of Mr. Reed could be developed as a highly intelligent, manipulative antagonist, potentially using theological or philosophical questions to unsettle them, making them question their core beliefs as they attempt to escape his traps.

If you're writing this or looking to develop it further, you could play with themes of faith, doubt, and survival, exploring how far one would go to defend their beliefs under life-threatening circumstances.