'One Chance? One Chance.' is an upside-down picture book that can be read forwards or backwards. It tells a story about the Hong Kong couple, once deeply in love, is now drifting apart like two parallel lines due to conflicts that have arisen between them, making it impossible for them to reconnect, no matter how close they were in the past. They feel regretful for the loss of what was once a strong and loving relationship.

The story is set against characteristic scenic spots in Hong Kong. Through the interaction and plot of the characters in the picture book, these places are integrated into the story, allowing readers to experience the beauty and unique cultural atmosphere of Hong Kong.