Double Agent 73 (1974)

After her adventure in Deadly Weapons (1974), Chesty Morgan is back as Jane, a special secret agent, and she's ready to take on a vicious drug-trafficking ring. Her mission: infiltrate the dangerous criminal underworld to ferret out the mysterious heroin baron, Ivan Toplar, and crush his criminal empire. Her secret weapon: a state-of-the-art gadget hidden in the most unexpected place. Who dares to stand in the way of Agent 73?