i think this movies is a sequel to the myth, because in the movies i saw the portrait of Ok-soo (Kim Hee-Sun) in Jack's house and Jackie Chan's character from The Myth also named Jack.
i finished it and i immediately rewatching it, i just like this drama and man the chemistry between Lee Bo-Young and Lee Jong Suk is off the chart, that's why i enjoyed this drama so much, especially for them as the main leads
my point of view in the story, i feel Ta Hwan, i watch this drama in Ta Hwan perspective, because i have been in his situation, alone and no one to care about and i understand his pain, while everyone turn their back against him even his own mother, for Ki Seung Nyang, not sure if she supported him, but i don't think she is fully supported him during Ta Hwan hardship. For Wang Yoo, that guy have support from his side and every loyal servant backed him, while Ta Hwan have nothing. because of his love for Ki Seung Nyang, Ta Hwan sacrifice everything to protect her dignity until his death and while Wang Yoo did nothing to protect her.
i preferred the original ending, why did they go soft on the main antagonist of the Series Yang Kang, i preferred where Yang Kang died for his own villainy and demise and continued this plot lines to the Return of the Condor Heroes.