The Magician must protect the Knight. That is the first law of the blood oath. However, Mona Flotan hates her knight; Eam Bealo, the heir of long standing prestigious chivalry house. Although once a childhood friend, they gradually stopped talking to each other for more than half a year. But one day, Eam suddenly will go on a dangerous mission. Without solving anything between them, will Mona let go and forever regret her decision? Or will she run and finally stand by her beloved knight as it should be?