After escaping the near tragedy of Stravaze, the Yamato resumes course to Telezart. En-route, what seemingly appear to be fireflies begin to float around and into the Yamato. The crew, in a trance-like state, capture these fireflies and keep them in containers around the ship. This sends the crew into a hyper-emotional state, which makes them act more irrationally. With the help of Keyman, they are able to neutralize the infestation.