Sandboy.Tikki is troubled because tonight is the kwami cycle, and Nooroo is supposed to be 3,500 this year. Since this is the only opportunity for kwamis to communicate with their kind (even from a distance) for an extended time, Marinette gives Tikki permission to go. Plagg sneaks out to attend when Adrien isn't looking. Nooroo also tries to leave, but Gabriel refuses to allow it. Wayzz stands guard, and Tikki and Plagg go inside the Miracle Box while Master Fu is sleeping, and the kwamis have fun playing. Gabriel senses an unidentified prey with intense emotions and sends out an akuma. Marinette is chased by a hysterical zombie-like Adrien, and then encounters "Sandboy", a Sandman-themed villain who is bringing people's nightmares to reality. At the same time, Adrien's nightmare is being closed off by a set of bars which later resembles a cage which he's trapped in. Just as the kwamis are about to make contact, they end up calling in Hawk Moth instead. Cutting off the connection, Tikki and Plagg return to their owners. Sandboy chases Plagg, but loses him. The heroes finally go into action, then face their worst nightmares: Ladybug becomes a powerless girl and Cat Noir fights an evil Ladybug. After much struggle, Sandboy is defeated and de-evilizes into a boy who had been terrified from horror movies. The nightmare may be over, but Gabriel is more confident than ever now that he has narrowed down the kwamis' location.