In 'Whose Hello?', players step into the shoes of detective Sara Echo, a quirky investigator with an uncanny ability to decipher the meanings behind greetings. After receiving a mysterious postcard that simply says 'Hello', Sara finds herself entangled in a bizarre conspiracy involving a juggling clown, a troupe of escape artists, and an underground cabaret of talking animals. As players navigate through a series of humorous scenarios and riddles, they must determine the sender of the postcard while engaging with an ensemble of eccentric characters who provide clues, red herrings, and absurd twists. Every choice influences the story, unlocking new greetings and revealing hidden motivations, leading to multiple possible endings that range from wildly funny to unexpectedly profound.