L.U.C.A.: The Beginning

Ji O wakes up from losing his consciousness and has no clue where he is. In fact, he isn’t sure who he is either. He just knows that he has a body covered in wounds and there are fallen people all around him. One man walks up to him with a knife in his hands. A year goes by and Gu Reum, a police officer, finds out that the man she was searching for is dead.

Ji O gets admitted to the ICU after suffering extensive injuries from the fall. Gu Reum also ends up in the hospital where she suddenly remembers seeing Ji O during her childhood. Feeling confused, she starts to look into Ji O’s identity. Meanwhile, the researchers from the Human Tech lab continue trying to bring Ji O in.

Ji O takes Gu Reum somewhere safe to heal her injuries. Gu Reum asks Ji O questions about her parents, but he doesn’t remember anything about them. Gu Reum takes him to a church to help him regain his memories. Meanwhile, Chul Soo scolds Son for losing Ji O. Son makes desperate efforts to find Ji O and Gu Reum.

Ji O remembers that he burned down the orphanage as a child and is in a state of shock. Gu Reum takes him to Jong Hwan at the NFS where he undergoes a number of tests to find out about himself. However, Ji O recalls more horrific memories while being poked and prodded. He runs away and ends up going to see an old friend.

Gu Reum brings Ji O home since he has nowhere else to go or anyone to depend on. There, Ji O comes to understand just how desperate and lonely Gu Reum has been while searching for her parents. Meanwhile, Lee Son is furious that he let Ji O go yet again. He decides to take a big risk in order to capture Ji O once and for all.

Ji O returns to the lab where he lived as a child. An unexpected someone comes to meet Ji O and tells him a shocking truth. Meanwhile, Gu Reum finds a new lead on her search for her parents and continues her investigation. When she follows the lead, she winds up at a place she once visited before.