In a sudden attack, the Chinese merchant ship "Lancang" was reduced to ruins on the Mekong River. Captain Lin Dong narrowly escaped death and the cargo sank into the river. This is not an accident, but the Golden Triangle drug lord Somchai's brutal revenge on his former ally Samba in order to compete for shipping lines, and Lin Dong is just a fish in the pond! Lin Dong, who lost everything, unexpectedly awakened the mysterious "Mekong River Navigation Map", which allowed him to see into the undercurrent of the river and predict the trajectory of enemy ships. He formed a revenge alliance with the ship owner Samba, who was also ruined by Songchai. However, the road to revenge is far more dangerous than imagined. Insiders of the Laos Drug Enforcement Administration, former US CIA agents, international arms transactions... A huge criminal network gradually surfaced.
