The series tells the story of a carpentry genius, Xiao Kang, who uses his wisdom to unlock the thousand-year-old Luban Lock. Together with the mortise and tenon spirit inside the lock, he explores the mysteries of carpentry craftsmanship. Through perseverance and hard work, he embodies the spirit of craftsmanship. At school, he studies, competes, and grows alongside his classmates. Ultimately, they collaborate to help people solve problems, grasp the essence of the artisan's heart, and carry forward the culture of craftsmanship.