Charlie goes to the bank to deposit some dough, but she is interrupted when their is a robbery, to the mice's confusion, it's not Limburger's goons. These new criminals are from the pits outside of town, and Vinnie has to go into them to rescue his bros from the fearsome PIT BOSS.

The heavy metal maniac Hard Rock is hired by Limburger to steal gold off a train, but to Limburger's surprise, this is one bad guy turned good. The mice however are reluctant to believe him, after all, he destroyed a lot of territory on Mars. Will the mice trust Hard Rock, or will they strip his strings for good?