The story revolves around a young boy named Matthew who begins to exhibit unusual behavior and claims to be communicating with an invisible entity named Chocky. As his parents grow concerned about his mental health, it becomes apparent that Chocky is an extraterrestrial intelligence exploring Earth through Matthew. The novel explores themes of communication, understanding, and the challenges of accepting the unknown, as Matthew's family grapples with the implications of Chocky's presence and the broader questions it raises about humanity's place in the universe.
