What is the ending of the Korean drama Secret?

Dong Can was used by the president's secretary 14 days ago and threw Xiaoxing into the sea to die. However, due to the hippocampus, his head was broken and he couldn't remember what he had done. 14 A few days ago, Xiaoxing's father got the photo given to him by the secretary, and let people sink Dongxin into the sea.

God gave Dong Can a chance. 14 days later, the same event happened again. He finally realized that he killed Xiaoxing 14 days ago. Only his death can change Xiaoxing's fate, so he chose suicide to make up for his mistake.

Dong Can was delirious because he was framed. When he found Xiaoxing, she should have fainted, but he recalled receiving a phone call from his mother before, saying that her mother had killed Xiaoxing. He decided to accept all this without hesitation.

A man threw a child into the sea, but it was actually him. Dong Can recalled that he threw Xiaoxing into the sea 14 days ago, which was tantamount to killing Xiaoxing himself.

It suddenly dawned on me that the witch said that one of the two people disappeared to end this fate, referring to himself and Xiaoxing.

The President's wife turned to Li Minghan, the office secretary of the second Attorney General, for help. When she heard that Xiaoxing had to be killed to save her children, she had no choice but to agree.