In the 1990s, Sierra Leone in Africa was devastated by wars and the illegal diamond trade became increasingly rampant. Archer (Leonardo DiCaprio) is a typical war profiteer who makes a living by reselling diamonds in war zones. In prison, he accidentally learned that the fisherman Solomon had a top-quality pink diamond. Realizing that this was his chance to leave Africa, he found Solomon after being released from prison and prepared to find the diamond with him and leave Africa. Solomon is an ordinary fisherman. He was separated from his family due to the civil war and was forced to mine diamonds by the rebels. He found a top-quality pink diamond and hid it. When the war came, Solomon went to prison and was rescued by Archer. With the help of war correspondent Maddie Bowen (Jennifer Connelly), he found his lost family. At this time, his son Dia was taken away by the rebels and his life and death were unknown. The angry Solomon agreed to cooperate with Archer to find diamonds and his son within the control of the rebels. Two completely different people, because of a blood diamond, their fates were linked together.