Xie Yu (Joseph Chang) and He Man (Fay Bai) are a dream team at their advertising company by day and a couple that is madly in love by night. However, with the pressures of work and their troubles in life piling up, their passion fades through time and a break up is nigh. At the brink of their break up, He Man loses five years of her memory due to a car accident. And as if hitting the delete key on all the bad memories she had with Yu, she falls madly in love with him 'again', only to find that Yu is already dating someone else. Lost, heartbroken and confused, Man is determined to find out what caused them falling out of love, and Yu promises to help her. As bits and pieces of her memories start to resurface, their powerful romance turns a new and unexpected page…