Three of the best Boxoids (robot boxing suits) have been stolen by Big Boss who plans on using them to steal the mazer melter from a construction site and use it to melt down the Empire City Power plant and cause a major blackout over the entire city unless Mayor Davis can cough up twenty million dollars in one hour. It's up to the C.O.P.S. team to K.O. Big Boss' plans before it's too late.