In 'Hello, Who's Calling?', players assume the role of Evie Mortensen, a snarky and resourceful private investigator who specializes in missing persons. One stormy night, she receives a series of cryptic phone calls from a mysterious individual who claims to have crucial information about her next case. As players navigate through a dark and twisted narrative filled with unexpected plot twists, they must decipher clues, choose dialogue options, and unravel the truth behind the identity of the caller. Each choice leads to multiple branching paths and consequences, testing Evie’s wit and intuition while unearthing secrets that threaten to endanger her and those she cares about.