Luigi has won a mansion in a contest which he did not enter, and he requests that Mario checks the mansion first. When Luigi realizes that Mario has been long absent, he heads off to the Mansion in search of him. In contrast to the mansion shown on his flyer, Luigi notices that it is old, haunted, and inhabited by multiple ghosts. Around the start of his adventure, Luigi meets Professor E. Gadd, who gives him the Poltergust 3000, a vacuum cleaner that is capable of capturing ghosts.