San finally discovers the true identity of the watchman who has been silently protecting him, and this revelation also makes him realize that too many people are putting themselves at risk for his sake, leading him to feel a sense of responsibility to keep those around him safe. At the same time, efforts to locate and identify Lee Seol are intensifying, bringing the search closer to fruition. However, Dan O, who is caught in the middle of it all, may no longer be in a safe position. (Source: Viu)