The ending of "The Wonderfools," which includes the death of Chae-ni, who convinced her best friend, Kang Ro-bin, and town complainer Son Kyung-hoon to hold her for ransom. However, Chae’s heart condition caused her to die during the fake-kidnapping. Her body was contaminated with a mysterious chemical, bringing her back to life with superpowers. The story details a dark history of Haeseong, a former orphanage used as a cover for scientist Ha Won-do's immoral efforts to develop a super-serum that grants eternal life. The Church of Eternal Salvation now operates in the area where the orphanage once did. In the future, Wondo is working on his experiments again, with the help of his former subjects Pal-ho, Ju-ran, and Ho-ran.