Magazine photographer Ann Larkin is snapping photos at Mexico's National Museum when she sees Brod Williams steal a painting from its frame. Convinced that Brod is the notorious art thief known as "The Wildcat," Ann follows him into the street and accuses him of being the thief. Even though the police attest that Brod is a New York City police detective, Ann remains dubious.

When a jury member takes in the defendant he couldn't convict, she has a bad influence on his son.