In 'Hello, Who's Calling?', you play as Alex, a weary private investigator who discovers a mysterious phone that connects to an alternate dimension. Each call reveals snippets of a parallel world filled with bizarre characters and intricate plots. As you navigate through the quirky conversations and strange dilemmas presented by the callers, your choices will lead to surprising twists that unravel a larger conspiracy. Balancing humor and tension, the game challenges players to decode riddles and understand the true intentions of their callers, all while maintaining their own sanity in a world where reality bends with every ring.