After everyone he loved was taken from him, Yeo Woon-hwi lost his sanity and lived as the “Blood Demon” until he met his inevitable end. Just as he thought the curtain had finally fallen on his tragic life, a familiar voice echoed: “Dad!” Granted a second chance, time rewinds to the moment before he lost everything. Now, he vows to dedicate his body and soul to protecting his family… But this time, he won’t be the “Blood Demon”… he will ascend to become the “Martial God”!