Asian Drama

Hyeon Jun, who transferred to Gwangsanggo, meets Jin Won, Byeong Yeon, and Yeong Su, who are armed with a knuckle, and forms to be the fourth musketeer. As the Four Musketeers continued their fearless moves, the rest of them showed up one by one.

After completing his mission in South Korea, a North Korean spy (Park Sung-Woong) hopes to return to his motherland to see his son Myung-Hoon (T.O.P) and daughter Hye-In (Kim You-Jung) again, but he is betrayed by his own country and killed by a South Korean agent.In North Korea, his children Myung-Hoon and Hye-In are sent off to a forced labor camp. Later, high ranking North Korean military official Sang-Chul (Jo Sung-Ha) visits Myung-Hoon at the labor camp. He offers Myung-Hoon a deal. If Myung-Hoon successfully carries out a spy mission in South Korea, Myung-Hoon and his sister will be released from the labor camp. Myung-Hoon accepts the deal and undergoes 2 years of intense training.Myung-Hoon finally arrives in South Korea under the guise of a North Korean defector. He is adopted by a South Korean couple who are actually North Korean spies and enrolls at a local high school. At his new high school, Myung-Hoon sits next to a girl named Hye-In (Han Ye-Ri). She has the same name as his younger sister. Hye-In is the frequent target of bullies in their class, but Myung-Hoon falls for her. Meanwhile, Myung-Hoon finally receives his mission from North Korea. He is to locate a North Korean spy with the nickname of Big Dipper (Jung Ho-Bin) and take him out. Meanwhile, a power struggle ensues in North Korea with the failing health of dictator Kim Jung-Il and Myung-Hoon quickly becomes a liability.