The story begins shortly after Steven finishes singing "Full Disclosure". On the way back to the Temple, Steven comes across debris from the Gem Warship, and begins crafting weapons and a mask from it, then puts them all in a handbag. Later, when Connie demands that Steven look her in the eye and tell her he doesn't wanna hang out anymore, he dons the mask, and pulls out the machete he made, then jumps out and stabs Connie in the abdomen, then tells her "we won't be". Later, Steven raids a boiler factory, kills a worker, and steals his outfit. Back at the Temple, Steven manipulates his age to an adult, shaves his head, and dons the outfit and mask, dubbing himself "Steven Voorhees", after infamous serial killer "Jason Voorhees". Right about then, Greg, after calming down from his panic attack earlier, rides in, looking for Steven. Just then, Steven heads down, impales Greg with the spear he made, then disappears into the shadows. A few days later, as Steven and the Gems are working on clearing the debris of the Gem Warship, Steven spots the Cool Kids walking up and walks away when the Gems aren't looking and dons his gear again. He then kills the Cool Kids one by one. Over time, the town learns of Steven's actions, not knowing it's him that's doing the killings. At night, Connie's parents search Beach City for Connie, but when they wonder towards the part of the beach where the Temple is, they find Connie, Greg, and the Cool Kids' heads spiked on a wheel, then Steven walks up to them, in his gear, and impales them both on the broadsword he made. After several months, Beach City becomes a ghost town, and the Gems begin to suspect something is wrong, and Steven tells them "this is a good lesson to the human race". Pearl begins to think that Steven did the killings, but then realizes that he couln'tve done it, so the Gems suspect Peridot did the killings. However, Amethyst slips on a lever, and the Gems fall through a hidden door, and find a lair beneath the house containing the bodies of Steven's victims. In the house, Steven realizes the Gems "have seen too much" and dons his gear after manipulating his age again. He jumps down into the lair and attempts to kill the Gems "for snooping on his personal work". The Gems put up a good fight, but Steven overwhelms them. Before he can kill them, however, Pearl impales Steven in the chest with her spear, and his mask falls off, revealing his true identity, much to the shock of the Gems. Pearl wonders why Steven would do this, but Garnet isn't surprised, as she realizes that Steven just wanted to keep humans away from the area to protect them, but it was a misguided attempt. Amethyst says they can protect humanity without him. Pearl says Rose Quartz would be disappointed. Garnet says Steven was a good kid for a time. The Gems then leave the lair and warp to the Kindergarten to look for Peridot.