In a bustling metropolis where faces are familiar but names are forgotten, players assume the role of an estranged detective who receives an unexpected package containing a dozen greeting cards, each signed with a single enigmatic 'Hello.' To untangle the mystery behind these greetings, players must navigate a web of quirky characters, each with their own secret motives and forgotten connections to the detective. Through choices and dialogue, they will confront their own past, forge unlikely alliances, and reveal a deeper conspiracy lurking beneath the city's cheerful facade.