A break-in at a WayneTech facility brings the Dynamic Duo toe-to-toe with a muddy menace. Clayface is pilfering unproven prototype weapons and it's up to Batman and Robin to track the criminal's slime spree through the streets of Gotham City. Can the Caped Crusader and The Boy Wonder get the weapons back, and contain the shapeshifting super-villain, before someone gets hurt?