 Mr. Prentiss is an appraiser at his firm, the House of Prentiss. He is about to go to Florida to appraise a vast collection of a recently deceased collector, Van der Locken, when he receives an unwanted visit from Ivor Hager, who informs him of "The Left Fist of David," a valuable but mysterious art object that was stolen from a Mexican church. Hager offers a bribe but Prentiss firmly rejects it and heads to Florida. In Florida, Prentiss meets up with his cohorts, Mr. Munsey and his secretary, and they set about to appraise the collection. However, Hager shows up again, since he is a neighbor, with a teasing shot of a bow and arrow. It appears all are interested in the "Left Fist of David." After a mistaken poisoning of a cat, Prentiss and Munsey become concerned, and fabricate a sculpture of a fist. Thinking the sculpture is real, Hager enters with a gun, ready to steal the object, but then discovers it s a fake. In a fight-out with Prentiss and Munsey, Hager fires his gun at the ceiling, where it hits a chandelier...