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Ji Sung, an NIS agent, is enraged and turns desperate after his colleague gets killed in Hong Kong after chasing Wang Wei. On the flight back, Ji Sung steals Wang Wei's passport. Subsequently, Wang Wei faints, swallowing a pill. Do Kyung says she'll pose as his fiancee, but Ha Jun, the monitoring team leader, asks her to go through immigrations. Ji Sung keeps an eye on Do Kyung walking to the transit area instead of immigrations . Later, Do Kyung and Ji Sung get arrested for a drug case.