Although Bruce Banner may have voluntarily turned himself in to the authorities at Gamma Base, the Hulk has no such predilection for staying. Doc Samson tries to keep him from leaving, but the Hulk literally pounds him into the ground until his young friend Jim Wilson manages to calm him down.
Meanwhile, Bobby Drake, aka Iceman, brings his girlfriend, Terri Sue Bottoms to the Rocky Mountains chalet of his friend and team-mate, the Avenging Angel, Warren Worthington III. As the friends are relaxing by the pool, they find themselves suddenly attacked by a disguised Master Mold. Master Mold captures Iceman, while the Angel flies off hoping to lure him away from Terri and his own girlfriend, Candy Southern.
Master Mold flies after him and before long, they reach the airspace over top of Gamma Base. The klaxons sound and Doc Samson runs out to face Master Mold. Master Mold quickly dispatches Doc Samson by slamming him into the side of one of the buildings, disrupting a formerly resting Hulk. The Hulk rampages outside just as Master Mold captures Angel. The giant robotic Sentinel then flies off, but the Hulk leaps onto him and piggybacks on Master Mold's foot.
Master Mold finally reaches his space station planetoid where he places Angel, Iceman and the Hulk into special tubes designed to dampen mutant powers. As the Hulk is not a mutant, he easily breaks free and releases the other two. The Hulk follows Master Mold back to his command center and lays into him. Master Mold tries to keep the Hulk at bay with a million volts of electricity, but this only stuns the Hulk momentarily who then proceeds to tear Master Mold into pieces. Afterward, the three heroes get into an escape pod and return to Earth.