In "Nightcall: Who's There?", players assume the role of Leo, an unsung detective who receives a mysterious phone call that leads him into the shadowy depths of the city’s underbelly. Set in an alternative 1980s world, Leo must navigate through a series of chilling encounters with enigmatic characters, each holding pieces of a dark puzzle. As players choose how to respond to phone calls and uncover layers of conspiracy, the game becomes a psychological chess match where every decision influences not just the story, but also Leo's own sanity. The line between lover, friend, and foe blurs as tension mounts and whispers of betrayal haunt every call.