Prince Bo sends the Ham-Hams on an important mission: to carry the ever-lasting hamtorch to Hamcropolis. His servants, Daisy, Ivy, and Rosy become jealous and try to steal away the torch, not knowing that Prince Bo had another important job for them. The Ham-Hams get help from friends new and old as they try to make their way to Hamcropolis while avoiding the pesky flying Rainbow Girls. Along the way, Hamtaro shares both the flame and the spirit of friendship.