The MacGuffin (working title)

In fiction, a MacGuffin is a plot device in the form of some goal, desired object, or other motivator that the protagonist (and sometimes the antagonist) is willing to do and sacrifice almost anything to pursue, protect or control, often with little or no narrative explanation as to why it is considered so important. The specific nature of a MacGuffin may be ambiguous, undefined, generic, left open to interpretation, or otherwise completely unimportant to the overall plot. A MacGuffin can sometimes take a more abstract form, such as money, victory, glory, survival, power, love, or even something that is entirely unexplained, as long as it strongly motivates key characters within the structure of the plot.

In this story, we open with our main character making a strange transaction with a shady figure. somehow (whether it be with large amounts of money or some sort of promise) he makes a deal with the character for a mysterious box, its contents unknown, except to the shady figure and our main character.

the box may have to be delivered in return for the shady characters promise of the mans safety... or the box could contain something that the main character doesnt want anyone else to see which is why he might buy it for large sums of money.

either way, the main character runs into another character who somehow robs him of the box. the rest of the story could be about our main character tracking down that character and gettin his box back, and at the end of the movie he locks it away.