At the age of 10, Ken masters the sword arts and becomes a 7-ring wizard. While wandering around the city, he comes across someone who seems strange and dangerous.
Ken follows the old man into a back alley, but the man suddenly disappears. Ken tries to sense its meaning, but can't sense anything. Suddenly, the old man appears behind him and holds the seemingly cursed sword to his neck.
He addresses Ken by saying "I've been waiting for you" and transfers his entire life to him thanks to his mind transfer ability.
Ken realizes that the old man is actually his 80-year-old self, and the two minds merge and a new mind is formed. He learns everything that will happen in the future and the past and gives him his sword. The old man divides time into two and returns to his own time.
He addresses Ken and leaves, saying, "Anytime you need me, just tell me and I'll come right away." Ken is very surprised by these events and calms down after the mind transfer is completed within a few minutes.
These events helped him learn about future and past events and gave him a new perspective. Now, Ken has the ability to predict future events and thus act more forethoughtfully and preparedly.
Since Ken learned about the future, he also learned about the bad events that will happen in the future. According to what he learned, within a month, the weakest of the Demon Lord's right-hand men would come to this city with his demon army and destroy it, and Ken would barely survive and take revenge on those who died in his country at the age of 15.
However, knowing what would happen in the future, he locked himself in his secret room at home for a month and started training. His strength is equal to that of a 30-year-old, and he hears the voice of the goddess again.
The goddess says, "I came here because I sensed a dark item. That sword belongs to this time and is cursed, but since you will defeat the Demon Lord, I will ignore it this time." And the time comes.