William tries to help Zach, a once-promising high school athlete who has fallen victim to meth addiction. William's efforts reveal a family fractured in the wake of a father's death, as well as an underground drug-fencing operation that he must crack.

The mother of a teenage surfer girl comes to William about her daughter, who exhibits signs of a drug habit--except her drug tests keep coming up clean. William, driven to investigate, discovers that the girl and her friend are drug mules, transporting heroin over the U.S.-Mexico border.

William and his team uncover a suburban drug ring after being contacted by a guy seeking help for his wife's addiction.

A mathematics professor, in a race against time to publish his research, turns to cocaine. His colleague and girlfriend seeks William's help.

A teenage boy asks for William's help with his father, who went to prison as a result of William's past efforts. The man, now out, is using meth again.

An FBI agent strong-arms William into searching for her former partner, who developed a drug addiction while deep undercover on a case. William and crew infiltrate a "tent city" of meth manufacturers to find the man, who is delusional and dangerous.