In-Sung decides to take a job as a drug testing volunteer for a pharmaceutical company, but he suffers an unexpected side effect from the drug that grants him superhuman intelligence and strength.
A former special forces soldier delivers revenge for victims of injustice while working for a secret organization that fronts as a taxi company.
A group of supernatural demon hunters known as "Counters," each with unique abilities, disguise themselves as employees of a noodle restaurant, while tracking down evil spirits that terrorize the mortal world.
Detectives from the present and a detective from the past communicate via walkie-talkie to solve a long-time unsolved case.
