He tried to convince Jumong to go back to palace and disband Damul Army as part of the conditions given by the Prime minister in exchange for his reinstatement. After solar eclipse, Geumwa regained power from Daeso with the help of Prime Minister.

In despite, Daeso holds Lady Yuhwa and Yesoya while pregnant with her son Yuri hostage in the palace. With Daeso's guard down, Jumong and his lieutenants manage to intercept and lead a large group of Gojoseon refugees into the wilds of Mount Bongye, where they establish a fortress and re-form the Damul Army, against Daeso's wishes. They return to Buyeo and Jumong feigns servitude to Daeso, thereby earning his trust. Jumong, however, is rescued by the Hanbaek tribe and nursed back to health by Lady Yesoya, whom he weds. In desperation, Soseono weds her trading partner Wootae (not knowing Jumong is still alive). Subsequently, Daeso seizes power in Buyeo by colluding with Xuantu Commandery and forces Soseono to be his queen. He returns to Geumwa and leads the Buyeo army in a campaign against Lintun and Zhenfan Commanderies, but is reported missing in action and presumed dead following an injury in battle. Following Haemosu's assassination by Daeso and Youngpo, Jumong learns the truth and vows to avenge his father and drive out the Han. At the same time, Jumong forms a close relationship with Lady Soseono of the Gyeru trading clan of Jolbon.

Jumong becomes skilled in combat under Haemosu's covert tutelage but is unaware of their father-son relationship. After escaping an assassination attempt by his half-brothers, Jumong leaves the palace and by a twist of fate, encounters his father, the now-elderly Haemosu in the wild. Twenty years later, the young Jumong is a weak and cowardly prince overshadowed and scorned by his elder half-brothers Daeso and Youngpo, who are vying for the inheritance of the Buyeo throne from their father (the now-King Geumwa).

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