Young Kim Chang-soo is placed behind bars, charged with murdering a Japanese person who took part in Empress Myeongseong's assassination. In prison, Kim Chang-soo sees how Koreans are persecuted and grows into a fighter for Korean independence.

An incident unfolds when a film crew goes to a reservoir to update the road view where an unidentified figure was filmed, and they encounter something in the dark, deep waters.

The trial of Lee Do Jin about his habitual dating abuse is held on-line. In the middle of the trial, prosecutor Kang noticed that something strange is happening.