Maa Purnagiri movie showcases the divine power of goddess Purnagiri who is one of the avatars of Devi. The story is set in a small town of Uttarakhand where the temple shrine of goddess Purnagiri is established and lakhs of devotees throng the sacred structure to fulfill their wishes, where a young girl who is a staunch devotee of the goddess too faces hardship in her family after marriage and how the goddess comes to her rescue is what the remaining story is all about.