The King 2 Hearts

The North and the South agree to enter the upcoming World Officer Championship as one team. North Korean officer Kim Hang-ah is lured with the prospect of marriage, and South Korean crown prince Lee Jae-ha is tricked into participating.

Somewhere in Frankfurt, Kim Bong-gu (English name John Mayer) quietly and secretly murders his father to become the owner of Club M. Meanwhile, the unified team heads to North Korea to continue training.

Ever bickering back and forth, Hang-ah and Jae-ha decide to settle matters with a treadmill competition. Meanwhile, a bomb explodes in the training area and sends the center into high alert.

Tensions run high at the training center when Jae-ha decides to play a prank on North Korean Rhee Kang-seok that ends up threatening the entire collaboration.

After the training has ended, everyone returns to their respective sides to wait until the championship. Jae-ha is glad to return home, only to find out that his brother wants him to marry a North Korean woman.

Publicly shamed by Hang-ah, Jae-ha vows to do much worse to her. Meanwhile, left back in Seoul, Si-kyeong is given the task of picking up Princess Jae-sin, who has managed to slip away.

Hang-ah enters the palace to be trained for life as the crown princess and clashes with the queen mother. Meanwhile, King Jae-kang and his wife go on vacation to a remote location in Anmyondo.

With the sudden passing of the king, Jae-ha finds himself the country's sovereign and juggling all the royal duties. Meanwhile, Chief Secretary Eun realizes that the death might not have been an accident.

North Korean items are found where Jae-kang was murdered, and in a desperate attempt to cover up his tracks, Chief Secretary Eun begins to manipulate both Jae-ha and Hang-ah.

Hang-ah is unceremoniously sent back home to North Korea, leaving Jae-ha to wallow in guilt. In order to set things right, he decides that he must first find his brother's murderer.

News of Hang-ah's miscarriage snaps Jae-ha out of his stupor and into action. Meanwhile, John Mayer has something destructive planned for Jae-ha.

Manipulated by John Mayer, some North Korean soldiers plot to hold Jae-ha hostage. Hang-ah tries to stay out of the situation until she discovers the special gift that he brought her.

Infuriated by Jae-ha's provocation, John Mayer decides to stEPout of the shadows and take the reins himself. Meanwhile, Jae-ha and Hang-ha try to persuade Jae-sin to be regent while Jae-ha is away at the WOC.

Si-kyeong detains Bon-bon at the royal palace but finds it hard to pin her down. Meanwhile, Jae-ha and Hang-ah find themselves in trouble with Kang-seok gets into a scuffle with the US team.

Up against the formidable US team in the WOC, the Korean united team decides to take drastic measures to win the first round.

The engagement party goes off without a hitch, and Hang-ah joins the queen mother in her volunteer work to adjust to life as a royal. Meanwhile, Jae-ha receives a mysterious email from Club M.

Under a false pretense, Hang-ah manages to talk to Jae-ha over a video call and give him a hint as to where she is being held. Meanwhile, Si-kyeong begins to wonder why his father was fired.

As Jae-ha searches for solid proof to charge Bong-gu through the ICC, Si-kyeong comes to a decision as to what he must do on his part.

Jae-ha stares into the barrel of Si-kyeong's gun, and things finally come to a head. He is surrounded by Bong-gu's men, and Hang-ah is racing to save him.

With a war between the North and South seemingly imminent, Jae-ha and Hang-ah must do what they can to stay together, stop the war before it starts and finally avenge the losses and pain caused by John Mayer.