Two students, Sanya and Rita, take part in an experiment on consciousness transfer. The course of the experiment is rudely disrupted by a certain Castro, hiding from his pursuers. A program failure occurs, and the three consciousnesses are imprisoned in one body. A "three-in-one" situation arises. Castro's mission, his many enemies and the problems associated with it, a heavy burden falls on the fragile shoulders of the shy, unsure of himself Sanya. "Nerd" expects incredible adventures, unexpected twists of fate, as well as rethinking the world and himself. Being far from home, Sanya completes the mission started by Castro. But then a thunderstorm happens...