In a twist of poetic justice, the very brain surgery intended to save Ba-reum's life becomes his greatest torment. By transplanting parts of the empathetic Sung Yo-han's brain into his own, Ba-reum is forced to feel the visceral pain and guilt of his previous murders.
In a moving final sequence, a dying Ba-reum has a vision of himself as a young boy (Jae-hoon) in a church. He tells his younger self that he is "no longer a monster," finally finding a small measure of spiritual peace before passing away. Legacy of the "Mouse" Experiment Watch Mouse S01E20 210519 720p-NEXT 1
The finale centers on Ba-reum's desperate quest for atonement, even as he knows he can never truly be forgiven by his victims' families. In a twist of poetic justice, the very
Ba-reum discovers that he is the biological son of the "Head Hunter," Han Seo-joon, and that his life was a meticulously controlled experiment by the OZ organization . He tells his younger self that he is