There’s no lock Detective Dobin Kim can’t open. With his unique ‘opening’ ability, he can unlock anything -- even people -- to get the information he needs to hunt down criminals and solve crimes. Enter Locker -- his polar opposite and his enemy. When Locker uses her ability to ‘lock’ a witness and prevents Kim from accessing key information in a crucial case, they plunge into a cat-and-mouse game with justice itself at stake. When two equal forces collide, who will emerge the victor?

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Official Traditional Chinese Translation
Official Indonesian Translation

In front of detective Dobin Kim, who has the ability to 'open' anything, a criminal 'locker' who 'locks' anything appears. The 'opener' struggles to catch the 'locker' in front of the important truth, one-of-a-kind relationship, and 'locked up' of a genius talent helplessly...!