Luigi's Mansion: Witching Hour is a video game for Nintendo Switch and a sequel to Luigi's Mansion and Luigi's Mansion Dark Moon. Unlike the previous game, Witching Hour has one mansion and and does not feature the appearance of Mario, Luigi's brother.
A few years after the events of Dark Moon, Luigi goes to visit Princess Daisy, but soon discovers that she has been kidnapped by a man named Norton, who was an old friend of Mario and Luigi's. He has gone insane thanks to the beauty of princesses Peach and Daisy; he has always wanted to marry one of them, but could not, because they were already dating Mario and Luigi, respectively. Driven by lust and madness, he kidnaps Daisy.
After realizing that Norton betrayed him, Luigi sets out to Norton's long-abandoned mansion to find out what he's up to.