A top assassin name Cherry has been assigned to figure out who murdered nine members of their organization. Her easy investigation takes her to an island own and run by a man named Mr. Island. He has six other guests and promises them their dreams will come true here. Cherry frowns and starts going over the place only to be attacked by the workers. After a series of battles, she learns Mr. Island made a deal with the spirit of a succubus named Rebecca Lionheart. He helps her come back to life and she will reward him with treasure she has hidden. Cherry must now stop them and avenge her fallen comrades and the guest whose souls have been devoured by the ghost of Succubus Island.