Diana and her commuter gang are back! Emerald earrings, an attack on a jeweler, a missing person, and a notorious cult lure Diana Jeffries into another mystery. Allen asks for help when his friend, Sol, a renowned jewelry designer is assaulted in his office and the police are clueless. Diana jumps at the opportunity to snoop, but in the midst of her investigation, she senses someone following her. During one of her outrageous attempts to glimpse her stalkers, the FBI and the New York Police Department (NYPD) intercept her and the gang. Unknowingly, she had stumbled into an undercover operation of a well-known cult. Through a maze of twists and turns, Diana and the gang uncover an ominous plan. After brilliantly presenting the facts she and the gang had gathered, she convinces the FBI and NYPD to execute a sting operation to thwart a worldwide economic catastrophe.