Central characters of last year's K-Drama Red Sky (Hong Cheongi 홍천기) include a king who abdicates in favor of his son, a benevolent ruler; and his ambitious grandson with a desire to be future king at any cost.
From that alone most Koreans would recognize the show's setting as the Joseon Dynasty at the beginning of the 15th century, so famous is the story of the King Taejong who reigned from 1400 to 1418. He retired to allow one of his sons to succeed him as the King Sejong (credited with developing the Korean Hangeul script). One of Sejong's sons—the infamous Prince Suyang—in turn went on to stage a palace coup and had his own nephew exiled (and later killed) so that he himself could take the throne.
The similarities notwithstanding, the creators of Red Sky insist that their story unfolds against the backdrop of a fictitious "Dan Dynasty". Ignore that its people dress in early Joseon-style clothing and live in period-appropriate architecture. There is no Taejong here, but Yeongjong. No Sejong but Seongjo. The power-mad prince is called Juhyang, not Suyang.