Luck-key is a remake of the 2012 Japanese film "Key of Life" which is also a good movie to see. I think remakes should bring something new to the story; it should be able to stand alone. This one does.
It's a simple story of an assassin who falls and loses his memory. A poor, unemployed actor swaps identity with him not knowing that he is a criminal. They begin to live out each other's lives.
I love how the lead blossoms in his new life as an actor and the romance that he finds. Yoo Hae-Jin is a fantastic actor and his quiet charm really comes through in this film.
There's action, romance, comedy, and a few really touching moments. What more could you ask for?