Lawyer Lee Jae-Sang (Rain) works for JK Law Firm, one of Korea's largest businesses. He's a great lawyer, but he's solely interested in winning cases for himself. Unexpectedly, due to a freak accident, he finds himself in a parallel universe. Lee Jae-Sang ends up working as a prosecutor in that city. To the letter of the law, he sticks to it. Fortunately, Lee Jae-wife, Sang's Ra Shi-On (Lim Ji-Yeon), loves Lee Jae-Sang and is devoted to her husband. It was ten years ago when Lee Jae-Sang and Ra Shi-On split up in the world where Lee Jae-Sang came from, and Ra Shi-On is a detective in that world. Lee Jae-Sang has a hard time dealing with his several personalities.