Ribcage Mask initially appears to attack Tsuyoshi Kaijo while he was on a mission to deliver the liquid explosive SX-2000 to a secret EAGLE facility for protection before it exploded in 30 hours time. Unknowing of Akarenger's true mission, the Masked Monster attacks him, ultimately cuffing his hands while he's driving Red Star and making him fall off a cliff, becoming seriously hurt. Though trying to reach the other Gorengers, Kaijo has a hard time with Ribcage Mask still searching for him and his means of communication in this dire scenario lacking. Ultimately, he ends up at a mysterious mansion in the woods, where a young female patron awaits him and tries to take care of him. But the mansion was in truth Ribcage Mask's trap: the girl in the mansion was already dead and he had revived he