Nanoha Takamachi, an ordinary third-grader, loves her family and friends more than anything else. One day, after having a strange dream in which a ferret gets injured, she sees the very same ferret in real life and rescues it. That ferret turns out to be Yuuno Scrya, a mage from another world who is trying to capture the 21 scattered Jewel Seeds before they cause serious damage to the universe. Yuuno is not powerful...