Niko has been summoned a case to catch the assassin ZI and the trail leads her and Robo to a florist's family. Eventually the case turns into a shooting between two assassin groups. The father is the target of the shooting and his son clarifies that the father is an 'alien'. The family escapes with Niko, Robo and Yo-chan's help and the father 'returns to his planet.' Also Robo's mother comes to visit and Robo pretend to be the infamous Korean actor Kang-sama.