An Irish freedom fighter, determined to escape society, accepts a job as a weatherman on a remote island in the South Atlantic. The island has only one inhabitant: Patrice Caffoe, a mysterious lighthouse keeper who offers the Irishman no assistance. On his first night on the island, the Irishman is attacked by strange monsters, realizing that his only chance of survival lies in seeking Caffoe's help and taking refuge in the lighthouse. The two are forced to work together to fend off the monsters in order to survive, and an unusual bond develops between them and one of the monsters.