A simple case turns into a web of lethal deception.

When sleek Emily Davies begs Elvin Suggs to trail her philandering husband, Nick, it seems like an easy request. Dimond "Di" Redding and Elvin are eager to get started on the first case for their new business, Grapevine Investigations. Along with help from their fellow Vietnam vet Cobra Glynes, they follow the cheating husband straight to St. Louis' notorious "no tell motel"—The Coral Court.

Right from the start Di distrusts Emily, a nurse at People's Hospital. She can't explain why she's uneasy until they spot the woman playing doctor with a plastic surgeon at the very same motel.

The mousy desk clerk Waldo E. knows his "regulars" but he refuses to divulge his secrets to the investigators. When one of his regular guests turns up dead, he still won't talk, not even to police detective Reggie Combs. The woman's sleazy landlord is quick to point the finger at Emily's cheating husband.

After another body turns up, this time at the Coral Court Motel, Elvin and Di discover there's no escape until they see this twisted case through to the bitter end...