Caden Bosch lives in two worlds. One is his real life with his family, his friends, and high school. There he is paranoid for no reason, thinks people are trying to kill him, and demonstrates obsessive compulsive behaviors. In his other world, he's part of the crew for a pirate captain on a voyage to the Challenger Deep, the ocean's deepest trench. There he's paranoid, wary of the mercurial captain and his mutinous parrot, and tries hard to interpret the mutterings of his fellow shipmates as they sail uncharted waters toward unknown dangers. Slowly, Caden's fantasy and paranoia begin to take over, until his parents have only one choice left.