Four African-American Vietnam veterans return to Vietnam and embark on a journey full of heavy memories and unfinished missions.The purpose of their trip was not only to find the remains of the squad leader who died in the year, but also to fulfill an old promise about burying treasures.In this once-war land, this group of old comrades not only have to face the harsh test of the natural environment, but also once again face the moral trauma and human struggles left by the war.Although the years have passed, the shadow of war still lingers in my heart, and their friendship, regrets and redemption have also been reignited and examined along the way.