Kojiro Himuro is a champion figure skater taking part in an upcoming world competition. Yet, he is suffering from a complicated CTEPH (chronic thromboembolic pulmonary hypertension). Kantaro Kurosu is the director of the Cross Medical Center. He asks Michiko Daimon to perform surgery on Kojiro, but, right before his surgery, she is deprived of “the most important weapon as a surgeon.”