Arthur and Buster are on the urge of finishing their story for the sequel of Robin Hood. Everything is well until Arthur discovers that Buster has decided to go on a long trip to bond with his dad.

When a mouse is discovered in the Read house, Arthur uses Nemo to try get rid of it, making Pal worried. Then, Ladonna shows up and shows Arthur, D.W., and Bud that mice can be friends as well as foes ...