Two Korean victims, one male named Sung Bang and one unknown female are shot in the middle of the street during a block party with no witnesses coming forward to give details. The only lead they could find from the scenes is a pair of clown glasses that were taken off after the shootings and appear to have a child’s fingerprint. Back at the station, Greg and Det. Brass search all onlookers and come across a “hip dude” who confirms that this is gang related, which is why nobody wants to come forward and risk their own life. Trying to identify the female, Det. Brass takes her picture around to plastic surgeons in Koreatown as autopsy proved she had a blepharoplasty which is cosmetic surgery to the eyelids. When Det. Brass questions the plastic surgeon, he learns that he was forced by the Kkangpae Dragons (a new gang unlike any other where extortion is their trade) to perform the procedure on the girl’s eyes.

Catherine and Det. Brass move to Dempsey’s Department store where Sung Bang was last seen on the surveillance camera. Upon viewing, they notice he is with a young boy. In the briefing room, C.P.S. Investigator Bae Chin tells Det. Brass that the boy’s name is Park Bang, Sung Bang is his uncle and the unknown female victim is his mom, Kora Sil. Kora has a background for prostituting while being HIV positive. After finding the location of where Kora logs on to a computer to exploit a social networking site, Det. Brass meets with Mr. Pan who knew Park’s father very well and treated them as family. Unbeknownst to him, Det. Brass tells him they are searching for Parker as he could be in grave danger now that his mother and uncle are dead.

Going on a search for Park’s candy wrappers, the CSIs notice they lead to a house in Koreatown. Nick, Riley and two officers approach the house and find an old woman, Mrs. Lee holding up her pistol in defense mode at Nick demanding they leave. With the language barrier, Riley gets scared and threatens Mrs. Lee to drop her weapon or she’ll shoot. With that, Park comes out of hiding and asks Mrs. Lee to drop her gun. After bringing Park into safety, Grissom realizes and that Riley questioned the child without an advocate present and scolds her for doing so. After having a doctor examine the boy, they realize he has a skin condition due a side effect from his HIV medicine and a gastric tube inserted in his stomach. When Dr. Freith arrived, he and C.P.S. Chin had to hold Park down to give him his medicine which he clearly did not want to take and instead bit Dr. Freith’s nose.

Wendy reports to Greg with Park’s fingernail scraping analysis to reveal the skin of Jin Ming A.K.A Mr. Pan. The scrapings are from Ming’s rear end, however his old photo showed him with tattoos as opposed to now where he has no tattoos meaning he covered them with replicated skin from his rear so that he could be part of the tattoo-less Kkangpae Dragons. Greg and Det. Vartann enter Ming’s house and find the room where Kora and Park were living and discover a lawyer’s business card just before a small explosive is set off in Det. Vartann’s face. Greg and Grissom learn that Kora was suing Park’s doctor because he wasn’t paying her enough money to put Park on the clinical trial for his HIV medicine. Knowing this, Grissom sits outside Park’s hospital room and confronts Dr. Freith who tries to inject Park with more medicine until Grissom puts a stop to it as it’s not helping the boy in any way but rather harming him. Seeing Grissom stand up for him, Park now trusts him and explains how Sung came back from jail and saved Park from being injected with the medicine by taking him away from Kora and Ming who wanted to keep giving Park medicine in return for money. Then, Ming and Kora found Sung and Park where Ming used two guns to shoot both Kora and Sung.

Riley believes Kora could have swiped a gun from Ming and shot Sung point blank and as Sung falls down he shoots back with the gun he was carrying in the front of his jeans. To prove Park’s theory, Grissom and Riley take Park to the scene and have him position the dummies as if they were his mom, uncle and Ming. When Park reenacts the scene as if he were Ming shooting his mother, Grissom sees the angle and height Park is holding his arm up “shoot” and realizes it fits perfectly concluding that Park was the shooter. Although Park is sent off to Juvenile Detention Center, he’s healthy and drug-free. Grissom has a moment of regret in solving this case, which leaves Det. Brass questioning the Grissom he knows.