Cosmic Granny and the Molars of Mercury is the latest adventure of Norma Gnarly, also known as Cosmic Granny, intergalactic crime fighter and her grandkids Ashton and Ashley, the Astrokids. This time, our team embarks on a mission to stop notorious intergalactic super criminal Denture Dan. Denture Dan is after the Molars of Mercury, which are believed to have mystical powers capable of powering a destructive weapon, the Cavity Death Ray.

As the story unfolds, Cosmic Granny and the Astrokids learn about the legendary origin of the Molars of Mercury, and Denture Dan's evil scheme to use them to destroy the planet Mercury! They face off against Denture Dan, in a race against time to recover the Molars of Mercury and prevent the annihilation of one of the most important planets in the galaxу.