Go Geon comes back to Goguryeo as an envoy of Silla. As the palace of Pyeongyang is in a state of unrest with his presence, King Yeongyang thinks deeply of what to do with him. Meanwhile, On Dal lives lonely in the mountains until he hears some unexpected news. Not knowing the true intentions that Go Geon holds, the tension within Pyeongyang palace thickens… On Dal sets off from the mountains to save Pyeonggang from execution. Although he manages to get there in time, he makes a promise with the King in return for the Princess’ safety. Meanwhile, in Silla, Go Geon tries to persuade King Jinheung in order to attack Goguryeo with Silla’s armies. The two empires now grow restless in the midst of war.