 Philip Marlow is the apotheosis of the cynical private detective: laconic ex-cop, six-feet of iron man, steely glare in a cheap suit. "Trouble is my business," says Marlow, whose latest business arrives in the form of a femme-fatale loaded with money and sin. When Helen Dabney hires him to retrieve a stolen coin, Marlow ends up in the cross-hairs of crooked cops and a homicidal collector. Inspired by the fiction of Raymond Chandler, MacGuffin is a film-noir that poses one big question: How much do you know about numismatics?