The story starts off with a truck with a large metal crate on it pulling up in front of the Gem Temple. The driver pulls up, walks up the stairway, and knocks on the front door. Steven answers, and theman says he has a package for him, but Steven doesn't remember ordering anything. He signs anyway, and a crane places the crate in front of the house, and the man gets back in the truck and leaves. When Steven and the Gems investigate, they find that it has a monitor, and Steven remembers the delivery guy giving him passcodes and a card. With them, he opens the door, and the Gems find Rexy the T Rex inside, sleeping. Rexy wakes up, but because of it's advanced age, it doesn't attack them, but is startled by the Gems' gems. Steven tries to calm it down, then notices the wounds on it, which he heals with his spit. The dinosaur then licks Steven. Steven gets the notion that the dinosaur likes him. In the distance, a man watches, and is surprised that Rexy didn't eat the Gems, noting that his plan failed. Steven then escorts Rexy to the bottom of the balcony of the house, where it takes residence. That night, Steven heads to the abandoned warehouse for a rave with his friends. The sounds awaken Rexy, who investigates. It finds the source of the sound, and is startled by the light and goes berserk, terrorizing the party. The Gems find out what's happening and head to the warehouse. Rexy roars in rage at the Gems, who shapeshift into Velociraptors (an idea Amethyst had) and fight Rexy, only to be bested by the creature, which chases Steven and the survivors to the lighthouse. Rexy climbs the lighthouse in an attempt to nip at them when the Gems return, fused into Alexandrite, and grab Rexy by the tail and pull him off. Alexandrite and Rexy are equal matches to eachother, with neither able to best the other, but then Rexy bites Alexandrite by the face and pulls her down, but before it can deliver the killing blow, Steven yells at it to stop, saying he understands that Rexy doesn't like the light. Rexy calms down, and Steven says he knows what it's like to be put up against something he doesn't like and wouldn't wish the same upon Rexy. Rexy, convinced, spares Alexandrite and the other, then returns to the bottom of the balcony while the Gems unfuse. Ronaldo asks how he did it, and Steven says he "has his ways". The next morning, Rexy heads back up the hill, looks onward toward the sea, and roars.