L.U.C.A.: O início

Ji Oh wakes up, grievously wounded, with collapsed men all around him. However, Ji Oh is incapable of remembering anything, including who he is. Meanwhile, Ha Neul-ae-goo-reum, a detective, fails to secure a key piece of evidence.

Ji Oh receives life-threatening wounds due to his fall, and Goo-reum wakes up at the hospital. Goo-reum remembers a boy from her childhood and begins to look into Ji Oh. Meanwhile, Lee Son visits the hospital to capture Ji Oh.

Ji Oh rescues Goo-reum, and Lee Son is reprimanded for losing Ji Oh. Goo-reum asks Ji Oh about her parents, but he is unable to remember anything. Goo-reum decides to take Ji Oh to a place that he might recognize.

Ji Oh is shocked to remember that he was the one who set the orphanage on fire. Goo-reum entrusts Ji Oh to Professor Oh, but Ji Oh recalls more uncomfortable details from his past during the check-up.

Goo-reum decides to take in Ji Oh at her place. Ji Oh realizes how desperate Goo-reum had been trying to find her parents. Meanwhile, Lee Son makes a dangerous decision to capture Ji Oh.

Zio revisits the laboratory from his childhood, where he encounters an unexpected individual.