The operation is a success. Soon-shin leads his first battle to victory and clears the misunderstanding among the people about exacting the grains. But Chief Commander Yi Il is displeased with Soon-shin for carrying out a military operation without his permission. Unable to reward his men with horses taken from the enemy, Soon-shin buys wine and food with his own stipend to reward his men for their victory. At the banquet, Soon-shin appoints Beksu as the instructor of the archery unit for his display of exceptional skills during the battle. Having lost one of his duties to Beksu, Oh Hyung's frustration with Soon-shin reaches its peak. Meanwhile, Jurchen Chief Matniungae and Sassonga swears revenge on Yi Soon-shin and his men and kidnaps Oh Hyung's younger sister Gobdan.
—https://www.yidio.com/show/the-immortal-yi-soon-shin