Lee Yool falls off a cliff and nearly dies in an attempted assassination. He loses his memory, and wanders for 100 days under a new name and personality. During this period, he meets Hong Sim, head of the first detective agency in Joseon.
The drama was mostly a slice of life drama with minimum story. The concept is fairly simple and was done before, "Save the Last Dance for Me (2004)" comes to mind immediately. The leads had a good characterization and received an equally fulfilling performance by their cast. Which also why the leads had a good dynamic going on. However, its biggest problem is its lack in variety. Since it's a slice of life, the cast felt limited in size while jumping between the same few members of cast. They also lacked a unique variety in their archetypes to help keep the drama lively and vibrant. The same thing can be said about its lacking length of 75min x 16 episodes. There were too many slow and uninteresting sequences that dragged each episode too far. A slice of life doesn't equal boring when they're done right. If this drama were to be cut down to 6-7 episodes it would have been much better.