Goong, Vol. 4

After the king grants his late brother a posthumous coronation, the
status quo shifts dramatically as his widow, Yul's mother, gains power
in the palace. And she definitely has it out for Shin and Chae-Kyung!
When the newlyweds are invited to go abroad, it seems like they might
be on the road to romance...but with Yul's mammy dearest determined to
make the couple miserable, will they even get off the ground?