Riku Kariyama is an architect tasked with constructing the Ryujin Bridge. Despite his dedication and perfectionism, he encounters unexpected challenges during the bridge's construction.

Riku Kariyama's (Takuya Kimura) job is that of an architect. He works as the chief of the civil engineering design department for a large construction contractor and has dedicated his life to building bridges. He is a perfectionist at his job. Currently, Riku Kariyama is working on the construction of the Ryujin Bridge, with the design beginning a couple of years ago. He soon faces unexpected difficulties.—AsianWiki