As Agent Hughes continues his investigation concerning Heroman, Joey is visited by his energetic big sister, Holly, who had come back from her band tour to check out the alien situation in Center City, albeit three months late. Deciding to crash for a few days, Holly soon makes Joey's life a living hell for him. Hughes meets up with Minami to ask why he is around in Center City. Later, an explosion occurs and Joey and Heroman investigate, but it turns out to be a trap laid out by Hughes. Joey and Heroman run off and Hughes catches up with them until Heroman breaks some rubble that was about to fall on him and escapes under the cover of dust, though Holly manages to catch a glimpse of him. After they reunite, Holly plays a song at the pier before revealing she intends to stay longer, having seen something interesting.