The railroad is trying to build a rail line through Snagglepuss' home. The president of the railroad happens to be an old school chum of Major Minor and asks him to help get rid of the pesky lion.
Snagglepuss saves a mouse from a mousetrap. Later Snagglepuss gets "captured" and is on a train to the zoo anticipating the good life. However, the little mouse tries to "save" him and help the unwilling Snagglepuss to escape.
After hiding out in his cave, a judge appoints Snagglepuss to take his place on the bench in an upcoming trial.
Snagglepuss tries to capture "Big Hombre" and earn a big reward, but he winds up being a babysitter for the outlaw's toddler "Little Hombre".