At work, she’s a renowned assassin. At home, she’s a single mom to a teenage daughter. Killing? That’s easy. It’s parenting that’s the hard part.

Tragedy, betrayal and a mysterious discovery fuel a woman’s vengeance for the loss of her tribe and family in this special episode of “Kingdom.”

Stagnant since 1903, at an elevation of 9000′, a volcano erupts on the mythical and majestic Baekdu Mountain.

A woman’s past as a convict follows her everywhere and because of this she doesn’t open up to others. But then she strikes up a friendship with a broken child…