Beautiful space alien princess Lum invades Earth on her UFO, and unlucky Ataru Moroboshi's world gets turned upside down! Will Lum become Earth's electrifying new leader? Or will Ataru somehow miraculously save Earth from space alien onslaught?

Once again, Lum has introduced a bizarre menace to Earth, causing her classmates to quake with fear--a judge who "vanishes" performers whose Hidden Talent Show acts are deemed subpar! Later, Mendo is shocked by the sudden announcement of his arranged marriage to a bride so secret even members of her own family don't know her!