Yoichiro Nozaki, a high-achieving office worker, collapses from an aneurysm. The doctor advises immediate surgery, but the outcome is uncertain. Even if successful, he might lose all his memories. Resigning from his job and leaving the surgery consent form blank, Nozaki falls into a deep depression. Seeking a change, Nozaki decides to go on a trip. On the morning of his departure, he meets Torigoe at their designated meeting spot. Torigoe suggests avoiding the expressway and instead taking National Routes to Kagoshima. And so, the journey of two men, both grappling with a sense of loss, begins.