A story in which Jimin, 24 years old, accidentally stumbles upon a mysterious portal that teleports him directly to the year 1056, which is when the Vikings were around. But what happens when he is teleported to that time all the way from 2020, and the portal appears only every 30 years? Jimin decides to try making it on his own until he stumbles upon a group of Vikings. Unbeknownst to Jimin, one of them, Jeon Jeongguk falls in love with him at first sight and wants to marry him as soon as possible. Will Jimin find a way to make the portal appear? Or will he be stuck in time? With a Viking that fell in love with him?