 A lovely blonde hops over the wall onto Perry Mason s office terrace, tossing a revolver into a flower pot. When confronted by him, she says her name is Virginia Colfax and claims to be a secretary next door. She quickly eludes Perry and disappears. Next door, majority stockholder Edward Garvin is in a proxy fight with his ex-wife Ethel and consults Mason about the case. Garvin finds the revolver and locks it in his desk. Ethel charges Edward with bigamy as his Mexican divorce may not be legal in the U. S. Perry advises the Garvins to flee to Mexico until their marital status can be documented. Ethel is killed and Edward is charged. Perry has to straighten out the true identity and purpose of the blonde and determine who stands to gain most from the proxy fight.