海軍罪案調查處洛杉磯支部跟美國緝毒局的卧底識穿販毒集團的奸計，他們打算利用潛艇由哥倫比亞偷運價值幾十億元的可卡因到美國，科倫和森必須儘快找到失蹤潛艇的下落。
When the NCIS: LA team and the DEA uncover the cartel's plans to slyly transport billions of dollars' worth of cocaine from Colombia to the U.S. using a submarine, Callen and Sam must quickly locate the missing vessel.
