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Teo succeeds in the 109 mouse reset experiment and becomes the leader of the research center. In order to find Sae-yan's biological father, Kun and Sae-yan look for old newspapers.
Lee Shin's attempted murder is revealed on the internet. Kun gets the black box video that recorded the incident and learns the truth.
Ju-yeon faces a life-threatening crisis after confronting Sae-yan's biological father.