For reasons that aren’t entirely clear, the Mad Thinker and Puppet Master agree to be led by Egghead on a campaign to go after Subby, Captain Marvel, and The Avengers. This is part two of that saga, which started in Avengers #63 and continues in Captain Marvel #14 and concludes in Avengers #64.
Look how Namor uses his bracelet as a set of brass knuckles in the fight scene above. Badass.
Toro appears to die at the end. It’s a good comic, tying Namor’s WWII history into the main 616 Universe.