Set in the bustling city of Salutation Heights, you play as an amateur detective who mysteriously inherits a bizarre antique telephone booth that receives unsolicited greetings from all around the world. Each hello carries a story, and it's your job to scrutinize these greetings for hidden clues about their senders. Players must engage in conversations, decipher codes hidden within the greetings, and interrogate quirky characters from the city to unveil the truth behind a series of odd town-wide disappearances. As you dig deeper, you'll encounter plot twists that challenge your perception of friendship and betrayal.