A family vacation to a working ranch introduces Professor Rebecca to Jake West. Rebecca is a widow chasing tenure, and Jake is a handsome cowboy who never settled down.

Shortly after the defeat of Majin Buu a mysterious Saiyan arrives on Earth warning Goku and his friends about a new, powerful enemy.

Ean has a critical mission to return to the future to save everyone. However, she becomes trapped in the distant past while trying to prevent the escape of alien prisoners who are locked up in the bodies of humans. Meanwhile, Muruk, who helps Ean escape various predicaments, is unnerved when he begins sensing the presence of a strange being in his body. Traveling through the centuries, they are trying to prevent the explosion of the haava.