Lucky key
The film tells the story of a professional killer with a 100% success rate, because the bathhouse key and the unknown actor exchange identities. Choi Hyung Wook (Liu Hae-jin) is a very brave professional killer,
The task success rate is 100%. After completing a single homicide commission and going to the public bath to take a bath, Hyung Wook accidentally stepped on the soap and slipped and injured his head and fell unconscious, and was rushed to the rescue team Member Jiang Lina (Cho Yoon Hee)
Rushed to hospital. Unknown actor Yoon Jae-sung (Lee Joon), who happens to be bathing in the same bathroom
After witnessing Hengxu's accident, Hen Wook secretly swapped the wardrobe keys between the two and took away Hyun Wook's money.
After waking up, Hyung Wook, with the help of Jiang Lina, a first aid team member who rescued him, began to live as Yin Jae-sung. In order to survive, Hyung Wook has to do various odd jobs until he discovers that he is an unknown action actor. With the instinct of the body, Hyung Wook can show perfect action scenes when filming, and gradually be appreciated by the director. And Yin Jae-sung also discovers Hyung Wook's killer identity,
He gradually develops a crush on Hyun Wook's assassination target, Song Eun Joo (Lim Ji Yeon). After that, after becoming a protector of Song Eun-joo, he had to start living as a killer