In 'Whose Hello?', players take on the role of an eccentric linguist who discovers an ancient artifact that grants them the ability to hear the voices of ancient civilizations. However, the voices are disembodied and often conflicting, leading to jumbled messages that players must decipher. As they travel through various historical eras and interact with famous figures, players must solve mysteries tied to the phrase 'hello' in multiple languages and cultures, showcasing how greetings have shaped human interaction throughout time. With time running out, players must piece together the ultimate truth behind who is truly saying 'hello' — and why they’re desperate for the linguist's help.