Student Cho Rim becomes a witness to her parents' murder scene, runs for her life from the suspect and gets hit by a car; Moo Gak then gets a call that Eun Seol was hurt; he rushes to the hospital and thinks she's dead from the neck wound.

Moo Gak asks to be a detective to the chief of homicide, who gives him a case file; Chief says only if he finds the culprit in ten days; Cho Rim suggests that Moo Gak be her sketch comedy partner in lieu of giving her the car repair fee.

Cho Rim tells Moo Gak that Joo Ma Ri's scent is headed to the river; her car and corpse are there; Lt. Yeom thinks the barcode on Ma Ri's arm is a chain murder and orders Moo Gak to join the special investigation team.

Moo Gak asks the troupe leader to take Cho Rim back, he orders him to make him laugh; they find body with an engraved barcode at the park, breaking the chain-murder pattern and creates chaos within the special investigation team.

Just after arriving to the restaurant, Moo Gak and the other detectives witness a man falling from the rooftop; Moo Gak discovers Jae Hee looking down from there; police arrests Jae Hee for being caught red-handed.

Worried about Cho Rim, Moo Gak asks her to stop investigating altogether; Cho Rim likes the fact she can use her eye for something useful and says Moo Gak can protect her if she's in danger.