After the bloody Xiang River battle during the Long March in 1934, the Red Army faces a massive force of 400,000 enemy troops. Shifting tactics, the leadership guides the cornered men through the legendary four river crossings at Chishui in an effort to outmaneuver the enemy. Amidst the chaos, a veteran clinging to a sacred vow and a homeless orphan fighting just to survive forge an unbreakable bond on the frontlines.