Katie and Eric begin taking all-natural herbal stimulants to help them keep up with the long hours they've been working, but after offering the herbs to a customer who passes out from over-exhaustion, they quickly learn about the little-known side effects of the drugs. Meanwhile, Maria becomes jealous when her ex-boyfriend Nicky starts dating Courtney, But she goes too far when convinces mall security guard Screech that Courtney is the thief that Screech has been looking for.