In a world where mystical Eastern influences reign, a sacred protection-bearing sibling duo becomes a target of Xuan Gui Zong, a notorious troop of henchmen working for the infamous Miè Tian Hai. The group relentlessly pursues the siblings for their possession of the Tian Xing Jiàn sword. Despite succumbing to Hai's power during a confrontation, the brother, and sister Dan Fei manages to briefly flee by jumping off a cliff. Afterward, a lone swordsman stumbles upon an abandoned temple and notices a Buddha statue sheltered under an umbrella protecting it from the pelting rain. Taking the umbrella, he is warned by a man relaxing under a tree to repay his debt by treating the next traveler he meets with kindness. Unexpectedly, he encounters Dan Fei, who is still running from Xuan Gui Zong. Though the swordsman abides by his promise, he becomes drawn into the conflict due to the enemy's nefarious magic. Thunderbolt Fantasy is a remarkable production utilizing puppetry and stop-motion animation techniques.