Kang Zhen (Gao Xiu/Kim Soo Hyun) lived with his half-brother and unmarried mother since childhood. Kang Zhen, despised by the common people, strives to make his family live with more dignity. His father left him only a necklace, so Kang Zhen cherished this only token that could contact his father. This necklace also shows the tangled fate of Kang Zhen and Wan Zhi (Han Ye Seul/Nam Ji Hyun). Wan Zhi is the first person Kang Zhen wants to cherish besides his family.
In a quarrel, Kang Zhen's necklace was thrown into the river by a bully, and Wan Zhi wanted to get it back for Kang Zhen. Zhiyong, who loves his sister, jumped into the river for wisdom and never got up again. Wan Zhi, who lost his brother, bid farewell to his love for Kang Zhen and left with pain and guilt.
After entering the society, Kang Zhen really lived up to expectations and achieved great success. At an engagement party, he met Wan Zhi who had lost contact for many years. This reopened the reason between the two.