One day, Ken, a hairstylist went to do the bridal`s hair. Much to his surprise, he bumped into his first lover, Bobo... It was the first day of summer vacation, the doctor diagnosed that Bobo`s mother should take a kidney transplant surgery immediately. Bobo was told that she could buy a kidney from the Mainland for about $60,000 - an enormous sum for a destitute family like Bobo`s. She was then referred by Wendy, her previous neighbour to work as a high-class prostitute to earn quick money. Unable to offer a better option for Bobo, Ken could only support her decision. After escorting Bobo to "work" for a week, Ken finally bursted and snapped at her in discontent and jealousy. Bobo then decided to go to work alone. Meanwhile, Ken also decided to go camping with his friends. When he got home, he was told by his mother that Bobo`s mother had passed away unexpectedly. Bobo and her younger sister were taken away by her relative. Bobo`s sudden disappearance ten years ago still lingered Ken`s heart. Their reunion forced them to walk through the time tunnel which stirred up every bit and piece of their past memories. Life is like a roller coaster with ups and downs and is ever-changing.