A world where pheromones are toxic and cause severe pain if not imprinted. Han Geonyeong, an Omega with a non-toxic pheromone, is helpless against the Alphas who target him. When he has nothing remaining but curses and resentment towards life, a strange man enters his life one day. The Alpha, Kim Jeongchan, introduces himself as a well-educated psychopath. He promises to protect Geonyeong, but his “protection” is a bit doubtful. “Don’t you want to go ahead and get assaulted first? I’ll come to save you.” This is a difficult love survival story of two people who were born differently and wanted to live like everyone else.