I Came Alone is a show dedicated to travel lovers and people who want to travel alone. Han Go Eun, Sung Si Kyung, Min Kyung Hoon, and So You are the hosts of this reality show that has been specially organized for this Chuseok. The people who are not quite well acquainted with each other are put into one place, and each trip is given a type of theme and the participants will behave according to it.
The participants, all from different fields of expertise, head to the same destination and meet for the first time. Once they all return from the trip, they gather up to recollect different memories of the trip by watching the recorded clips and getting quizzes on them. They go alone on the trip at first, but they come back with others.