Emma tries to help her drug addicted sister and learns that local addicts are exhibiting strange mutations linked to tainted heroin.

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A TROUBLED GIRL CLAIMS THAT A DRUG DEALER’S HEROIN SUPPLY IS LITERALLY TURNING ADDICTS INTO MONSTERS.

Inside a flophouse motel in Vancouver, British Columbia, a young drug addict named Elissa gives herself a heroin injection. As her roommate, Tamra, prepares to follow suit, Elissa makes her way to the bathroom. Suddenly, Elissa’ s body is rocked by violent spasms. Fearing for her friend’ s well being, Tamra enters the bathroom. To her horror, Elissa has transformed into a reptilian-looking creature. Tamra runs into the hallway, where she calls for help. There she encounters two drug dealers, Pulga and Johnny. The two men enter the room as Tamra waits outside. Shortly thereafter, they exit and warn Tamra not to tell anyone about the incident. Tamra reenters the room, but finds it empty. She peers out an open window into the alley below, where she sees Elissa’ s lifeless body. She then phones Emma Hollis at FBI headquarters.

Back at Quantico, McClaren tells Frank that Emma tested positive for heroin. Frank dismisses the idea as absurd. A short time later, Agent Baldwin discovers a packet containing white powder amongst Emma’ s personal belongings. Frank approaches Emma, hoping she will shed some light on the situation. But she decides to take her attorney’ s advice and remain silent. Emma travels to Vancouver, where she pays a young dealer to help her find Tamra. The dealer runs off into the night. A short time later, a car pulls to the curb and Tamra, badly in need of a fix, steps out. Emma checks her into a methadone house. There, Emma tells Tamra that the substance she sent her in the mail has not been tested. Tamra claims that the heroin turns people into monsters. She also tells Emma that a dealer named Pulga is distributing the drug. Shortly thereafter, Emma approaches the young dealer she paid to find Tamra. He tells her where she can find Pulga.

Emma drives to the flophouse motel, but she has little luck finding Pulga. She then boards a freight elevator and descends to a vestibule that leads to the alleyway where Elissa met her death. Suddenly, a car enters the alley and bears down on her. Johnny exits the vehicle and opens fire. Emma manages to escape and makes her way back to the elevator. Johnny pursues her into the vestibule, where a struggle ensues. Emma manages to disarm her attacker and knocks him into the space where the elevator will soon land. Realizing he will be crushed, Johnny surrenders. But when the elevator comes to a halt, Pulga, gun in hand, exits. Emma tries to run, but Johnny pins her against a wall. She accuses the duo of selling contaminated heroin. As police sirens sound in the distance, the dealers shove Emma onto the floor and kick her repeatedly. They then make their escape.

Frank travels to Vancouver after he discovers Tamra’ s name in Emma’ s Rolodex. He visits Emma in her holding cell at the Vancouver police department. He is now aware that Tamra is actually one of Emma’ s relatives. Emma explains that Tamra sent her an unmarked packet in the mail. Emma tasted the sample, thereby explaining how she tested positive for heroin use. A short time later, Frank receives a phone call from McClaren. It turns out that the white powder that had been sent to Emma is eighty per cent heroin.

Frank checks with Vancouver police in hopes of verifying Tamra’ s story about Elissa. Unfortunately, there are no unidentified bodies at the morgue that match her description. A short time later, Detective Rondell, of the Royal Canadian Mounted Police, contacts Emma and Frank when Elissa’ s body is pulled from a river. As Frank and Emma observe, a coroner performs an autopsy on the body. Emma tells the coroner about Tamra’ s claim that Elissa resembled a monster shortly before her death. The coroner explains that his office has seen a number of overdoses in which the victims were searching for that mythological monster, a kind of urban legend. Frank begins to suspect that the disfigurement Tamra spoke of was…