A strange, red circle appears on the neck of a man saved from the guillotine. What is its mysterious meaning? Tragically, it turns out to be something of a family curse, as each generation thereafter bears the same sign, which in turn leads to blackmail and murder.

Philly boys Al and Birdy became friends in high school despite the extreme difference in their personalities, Al being the popular and athletic extrovert, Birdy the antisocial "weird" introvert. Al gave Birdy his nickname because of his fascination - obsession really - with birds, especially with flight. Al and Birdy have just completed their service of duty in the Vietnam War and have returned to the States. Al sustained some serious physical injuries, which required major reconstructive surgery to his face.

A detective falls in love with the diamonds–and the girlfriend–of a thief he's pursuing.