'Search' tells the story of a special group of searchers who try to uncover the truth behind the mysterious disappearances and murders that take place in the demilitarized zone (DMZ).

Krystal plays Son Ye Rim, a special officer and lieutenant of the CBR Defense Command (chemical, biological and radiological).
With his intelligence, he received top marks in military science and comprehensive evaluation for military training during his time at the Reserved Officer Training Corps (ROTC).

After he graduated first, he attended the United States Military Academy (USMA) and completed his training abroad.
Together with his courage and courageous spirit, he had absolute trust from everyone.

Jang Dong Yoon will be playing Yong Dong Jin, a military dog ​​handler and sergeant who is about to complete his military service when he is suddenly assigned to the search party.

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