In *Calyx*, the story unfolds of an unusual friendship between Armin, a successful high school graduate, and little Dennis, who is threatened by an incurable virus. As part of his voluntary social year in a municipal hospital, Armin discovers a well-kept secret about a room where Dennis is in the isolation ward. The virus, transmissible through blood and bodily fluids, has turned the once innocent boy into a little monster. Despite the warnings and his girlfriend Ruth's fear of possible infection, Armin decides to gain little Dennis' trust. A tender friendship develops, which is challenged by Doctor Pneuma's merciless control and the boy's isolation. Ruth, initially skeptical, eventually succumbs to little Dennis' charm and mischievousness. *Calyx* is not only a novel about friendship and respect, but also a story full of humor, drama, suspense and adventure. The close bond between Armin, Ruth and Dennis is put to the test when they embark on extraordinary adventures together outside the supposed safety of the hospital. This novel shows that nothing in life can be planned and that things always turn out differently than you think.