Chu Yin Yin is a proud and intelligent girl who always keeps ahead of others, combining beauty and wealth. It may be said that she is the winner of life. Xia Er is an internet star who grew up in a small village. She used to sell clothes, cosmetics, and unreal stories online for a living. No one knows that these two girls were adopted by different families separately in their childhood. In an accident, their identities were swapped. Xia Er replaced Chu Yin Yin although she can’t adapt to a luxurious life. Chu Yin Yin lost her memories, she went to the third-tier school in the village. Both of them try to find out solutions, but every time they ended up in danger. Before the truth is revealed, Xia Er suddenly finds a hidden secret: her sister's falling into the river was not an accident! Suicide or murder? In the confusing suspense, the mystery will be solved.