Despite her usual optimistic outlook, Hana's luck takes a downward turn as job rejections pile up. Venting her frustrations to a stranger one day leads to an unexpected twist. This stranger, who vanishes before introductions are made, leaves Hana with a phone containing only a mysterious messaging app. Curiosity piqued, she logs in to find a user named 'Unknown' claiming knowledge of the person she seeks. With a blend of suspicion and fascination, Hana embarks on a chat with this enigmatic figure. Who was the compassionate stranger from the street, and what secrets lie behind the cryptic 'Unknown' alias? To unravel these mysteries, Hana must embrace a cryptic and intriguing invitation.