Marine Corps Master Sgt. Jerry Ensminger was a devoted Marine for nearly twenty-five years. As a drill instructor he lived and breathed the "Corps" and was responsible for indoctrinating thousands of new recruits with its motto Semper Fidelis or "Always Faithful". When Jerry's nine-year old daughter Janey died of a rare type of leukemia, his world collapsed. As a grief-stricken father, he struggled for years to make sense of what happened. His search for answers led to the shocking discovery of a Marine Corps cover-up of one of the largest water contamination incidents in U.S. history. Semper Fi: Always Faithful follows Jerry's mission to expose the Marine Corps and force them to live up to their motto to the thousands of soldiers and their families exposed to toxic chemicals. His fight reveals a grave injustice at North Carolina's Camp Lejeune and a looming environmental crisis at military sites across the country.

자랑스러운 해병장교로 25년간 근무해온 당당한 군인, 제리. 하지만 부대에서 불법 방류한 오염물질이 사랑하는 딸 제니의 죽음과 관련되었다는 사실을 알게 되면서 견고했던 그의 세계는 흔들린다. 그저 진실을 알고 싶었던 제리는 변명과 은폐를 시도하는 미 해병대의 모습을 보면서 자신이 평생을 바쳐 헌신했던 곳에 대한 깊은 배신감을 느낀다. 명예로운 해병이자 아버지로써 진실을 향해 다가가는 제리의 모습이 오랫동안 기억에 남는 수작. (2012년 제9회 서울환경영화제)