Wu Yu studies mathematics, and Tan Jiao makes a living writing detective novels. Wu Yu and Tan Jiao were engulfed in a whirlwind romance after meeting each other on a cruise ship. The two fall in love with each other, but end their journey with varying degrees of memory loss. Wu Yu does not remember a few days after his trip, while Tan Jiao has lost almost a year and a half of memories.
Wu Yu is a gifted mathematician and an excellent student with a bright future. His life changes dramatically when his mother and younger sister, who are his only relatives, suddenly die. To find the real killer, he works as an auto mechanic and crosses paths with Tan Jiao again.
Based on the novel of the same name by Ding Mo.