Choi Minho is the owner of a travel book shop by the name of Notting Hill. He was recently broken up with and lives with an eccentric aspiring musician named Jonghyun. He is ready to just live a simple life within the company of his married friends, Jinki and Joon, and little brother, Taemin.

Taemin and Jonghyun are princes of neighboring lands who have been exchanging letters for ten years, baring their souls to one another, but never meeting in person. When a neighboring kingdom begins its advance on their own, the two are given the opportunity to meet. But things never go as they are intended and the two get tangled in a web of lies that ensnare their best friends with them. Will they be able to navigate their way out of their entaglement while protec