Moon Knight eventually gets drawn into the Superhero Registration Act as he investigates a string of murders perpetrated by Midnight, his former sidekick. Other Marvel heroes take notice of his violent return to vigilantism. Spider-Man attempts to contact Moon Knight but is rebuked. Captain America pays him a visit to deliver a warning and they quarrel. The Punisher and Moon Knight have a lengthy conversation about the nature of their vigilantism and their shared past. Moon Knight is forced into a final confrontation with his cybernetically enhanced former sidekick Midnight, seemingly killing him for good.