Time returns to the ancient medieval era in France, Europe. In a room, the brave swordsman Jerry gazes intoxicatedly at a photo of his girlfriend Lily, lovesick to the core. In another room, the little swordsman Nepos is reading a book of swordsman legends. Jerry picks up his pen and writes a passionate love letter, ordering Nepos to deliver it to his girlfriend. Who would have thought that as soon as the little one steps out the door, he runs into the fierce, bullying old cat Tom. Outnumbered and weak, Nepos flees back inside, but how can his teacher allow his disciple to be so cowardly? Thus, Nepos uses words from the swordsman books to bolster his courage and bravely steps out the door again. 　　Jerry, deep in the throes of love, naturally pays no mind to how dangerous the outside world is. He and his girlfriend exchange letters incessantly, leaving poor Nepos, the messenger, to face Tom’s fierce attacks time and again. Such is the trouble stirred up by love!