What if every day you were walking over a time capsule of secrets?

This is the fascinating true story of such a mystery being uncovered in the middle of a busy Brooklyn intersection. A documentary film is being shot as Bob Diamond, a man determined to solve the mystery once and for all, excavates the world's first subway and searches for an abandoned steam locomotive engine and the fabled missing pages from John Wilkes Booth's diary.

Here is the teaser trailer to the as-of-yet unfinished documentary: