The short film "one plus one" is based on my own experience. A person has a dual personality, and his master personality has extreme obsessive-compulsive disorder, requiring everything in the world to belong to his own order, for example, he arranges things neatly and has his own place, he must walk in a straight line, and so on. His secondary personality is extremely disordered and takes control of the body when the order of the main personality is disrupted. The film tells how two personalities compromise, merge and finally die in life step by step.