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."

After being kidnapped and imprisoned for fifteen years, Oh Dae-Su is released, only to find that he must find his captor in five days.

Followed by Ma Seok-do, who heads to a foreign country to extradite a suspect. However, he discovers additional murder cases and learns about a killer who had committed crimes against tourists for many years.