Rock Krusher has taken over Graystone Prison and plans on using a large device known as The Neutron Pulverizer to disintegrate City Hall unless demands are met by 6:00 pm. Bowser, going undercover as a prison inmate named "Maddog", was able to radio the C.O.P.S. team on Krusher's plan just before Krusher cuts off all communications to the outside. The only way for the C.O.P.S. team to stop Krusher's plan is to break into the prison the same way inmates break out.