Submerged

Chris Cody (Seagal) is summoned from his military prison cell and promised a presidential pardon - with a hitch. An American Ambassador has been assassinated - by the U.S. Secret Service. Now the C.I.A. wants Cody to uncover and terminate this deadly operation, but they don't tell him the truth. Cody ends up overpowered and trapped beneath the waves but hardly out of his depth. (official distributor synopsis)