In 'Whose Hello?', players step into the shoes of a quirky private detective named Riley Vox, who has a knack for finding out secrets through voice recognition. After receiving a mysterious phone call from an anonymous voice, Riley is drawn into an elaborate web of lies, mistaken identities, and curious characters in a bustling city filled with sound. The adventure takes them through dark alleys, lively street markets, and clandestine nightclubs, where every 'hello' could lead to a clue or a trap. Players must navigate through a series of challenging voice puzzles, engage with eccentric NPCs, and unravel the enigma of the anonymous caller, all while making choices that affect the storyline's outcome.