Slime Princess needs a husband or else she'll lose the Slime Kingdom to her obnoxious sis. Finn steps in to save the day, but first they will need to win a series of Love Games to prove to Slime Princess's dad that they are really in love. This is definitely NOT what Finn signed up for!

Finn meets the Box Prince (a cat with a box on its back) and discovers the Box Kingdom has been taken over by an imposter. Now, Finn must help the real Box Prince reclaim his rightful throne.