"Demon's Mansion" tells the story of Rose, a desperate young woman who makes a deal with a demon named Dante. In exchange for his help, Rose agrees to serve Dante in his mansion alongside other pact makers. But when Rose's half-sister Lunette shows up having also made a pact with Dante, things quickly spiral out of control. Now Rose must navigate the dangerous world of the supernatural while also dealing with the ghosts of her past coming back to haunt her.