During the Ming Dynasty, Lu Yu, a commander of the Embroidered Uniform Guard, was struck by lightning while saving Princess An'an on the day of the alignment of the seven stars and traveled to modern times. Coincidentally, he was rescued by Leo Vance, Julia An's father, and brought to his home. At Leo Vance's house, Lu Yu saw a photo of Julia An and mistakenly thought that the princess had also traveled to modern times. However, he didn't expect that Julia An would be kidnapped by a fraudulent criminal group while traveling. In order to rescue Julia An, Lu Yu discussed it with Leo Vance. Lu Yu disguised himself as a tourist, retraced Julia An's travel route, and successfully infiltrated the fraud gang. On the other side, Leo Vance found Liu Sisi to negotiate with the fraud group and pay the ransom to ensure Julia An's safety. In the end, Lu Yu was sent to the fraud group as a piglet as he wished, and also saw Julia An who was also kidnapped. However, Lu Yu discovered that the Julia An in front of him was not his Princess An'an, which immediately plunged Lu Yu into a dilemma. In the end, Lu Yu made up his mind to rescue Julia An no matter what. So after Lu Yu and Julia An discussed it, they used their wits and courage to fight against the members of the fraud gang, while designing to eliminate the left and right arms of the boss Leo Vance, and on the other hand, they collected the criminal evidence and related account books of the fraud gang. Finally, in conjunction with the police, they successfully destroyed the fraud den, rescued many fraud victims, and Lu Yu stayed in modern times at the request of Julia An.