Captain America fights his way past a team of bodyguards to confront Texas Jack Muldoon in his penthouse suite. At Cap’s request, the oil millionaire relates how he saw the Falcon vanish into thin air; Muldoon’s science expert Beasley arrives with more details….
After the Shock Treatment administered by the Night People, Falcon and Leila are docile, brainwashed members of this eccentric community. Now that they have a superhero of their own, Brother Wonderful assigns Falcon to protect them from an approaching monster. The hero flies out of a window—revealing that Zero Street is on a small planetoid in space! Flying to the other side of the rock, Falcon encounters the huge, fire-breathing monster and gives battle. He is no match for his enormous foe: pelted by rocks Falcon falls unconscious into a mud puddle, from which he is easily retrieved by his enemy….
Cap is shocked at Beasley’s findings: the Night People are inmates of an asylum which vanished from the streets of the city into another dimension, thanks to the mad physicist Doctor Abner Doolittle, who had perfected the means to travel between dimensions while incarcerated in the institution. Cap phones Sharon Carter to explain that he is tied up with a case and she responds bitterly, bemoaning the fact that his hero career always comes between them; she hangs up and dissolves into misery and self-pity. A dejected Cap sits and watches the site of the missing asylum through the night when the flaming portal suddenly appears….
On the other side, Falcon has awakened in the clutches of the monster and manages to force his way from the creature’s stony grip. He flies off and circles back, ramming his foe with all his force, knocking the monster off the planetoid into the cold reaches of space. The Night People cheer at their deliverance at the hands of their superhero but they then realize the enormity of the task as space is filled with planetoids each carrying a threat of its own. Brother Wonderful (the former Abner Doolittle) has a brainstorm: why not use the dimension transporter to send all the monsters to Earth?
Meanwhile, Captain America, acting quickly leaps through the portal into the unknown—and, on impulse, Texas Jack Muldoon follows him through….