This drama is a fine proof that a complex and messy time travel drama can be done right, just once. The premise is simple on the surface - what if you could change the past, including your sad past? This crime thriller - indirectly time travel drama definitely surpassed similar drama in terms of its storyline, directing and acting. The story has more than meets the eye; how the past has more intricate connections than I could ever imagine - like peeling layers of an onion. Cha Soo Hyun (Kim Hye Soo) portrayed her character seamlessly; going back and forth between her past and future character. Lee Jae Han (Jo Jin Woong) turned the drama into a quite emotional journey as the story progressed. Get ready for a box of tissue, you are going to cry and rooting for Detective Lee Jae Han. Park Hae Young (Lee Jae Hoon) can be over dramatic sometimes - but it's minor. The classical and nostalgic OSTs are gems - hard to forget. After all, can a Misaeng production team gone wrong?