Tony Scott to direct Narco Sub

Unstoppable Unstoppable director Tony Scott is already lining up his next directing project: drug-themed action thriller Narco Sub .

The screenplay is being written by Safe House 's David Guggenheim, and it has been described as reminiscent of Scott's Crimson Tide and Man On Fire .

The exact plot is being kept tightly under wraps for the time being but, as Slashfilm points out, the title could give be dropping a hint to what we should expect.. .