Start of Kamen Rider OOO.
Two thieves posing as security guard rob the Kougami Art Museum. The third guard, Eiji Hino, is drugged. During the robbery, a pile of coins form an arm, which opens the seal on a sarcophagus, releasing four monsters. The Kougami Foundation sends the Ride Vendor First Platoon to destroy the museum, hoping to trap the Greeed monsters inside. However, they escape and kill all but one of the platoon, while Kougami Foundation's leader, Kousei Kougami, decorates a birthday cake for the Greeed. Later, Eiji finds a strange red coin. He takes the coin thinking it is his pay before the wall falls down and he finds himself stood in his underwear in front of several rescue workers and police officers. He is questioned by Detective Shingo Izumi, Eiji leaves, followed by the arm. He soon passes a vending machine and tries to use the red coin in it. He drops the coins and helped to recover it by Hina, but she is scared off by the arm. The arm demands the coin back and chases Eiji. Meanwhile, the Greeed Uva creates the Kamakiri Yummy using a woman in a jewelery store. He sends the Yummy to find Ankh, the arm, and retrieve the Core Medals he stole. The Yummy finds Anku, with their fighting killing Izumi. Eiji tries to fight the Yummy, so Ankh gives him the OOO Driver belt and three Core Medals, which he uses to transform into Kamen Rider OOO. Eiji fights the Kamakiri Yummy as OOO Tatoba Combo and eventually destroys the monster. Afterwards, Ankh possesses the lifeless body of Izumi in order to move more easily. Nearby, Shintaro Goto, the sole survivor of Ride Vendor First Platoon, sends a group of hawk-like robots at OOO and Ankh while Kousei Kougami decorates another cake, this one for Kamen Rider OOO.moreless