Her friend from high school, Detective Jung Yi Hyun calls Sae Bom to let her know that a SOU recruit, Lee Jong Tae is involved in a murder case that just occurred. It seems Lee Jong Tae gave some sort of drug to his friend who bit off the victim’s neck and killed him. Sae Bom, who needs to work hard and earn points to qualify for the public rental apartment, goes out to get Lee Jong Tae despite Yi Hyun’s warning.