Speckles, a ferocious tarbosaurus and his young son junior, mourning the loss of their family in an epic battle, roam the lands in search of food, adventure and peace. Under the watchful eye of his dad, Junior is growing up healthy and strong, but with an overconfidence thanks to his young age. After one encounter results in Junior being kidnapped, Speckles embarks on an adventure to the ends of earth to find his son. Encountering friend and foe, ally and enemy, Speckles will stop at nothing and will take on all corners to save his offspring.

The story is set 70 million years ago, when dinosaurs ruled the Korean Peninsula the same way they ruled the rest of the earth. Spotty is a curious and playful Tarbosaurus child, and along with his mother and siblings, he lives happily in the forest. One day the cunning One-eye, an older Tyrannosaur looking for a new home, attacks Spotty’s herd and separates Spotty from his family. Alone, he befriends another lost girl Tarbosaur who becomes his friend and constant companion for two decades and the mother of his own children. But Spotty’s troubles with One-eye are not over, and revenge, death, fear, and sadness are all in Spotty’s future―as is happiness and hope.

Tarbosaurus: The Mightiest Ever is a South Korean adventure drama film directed by Han Sang-Ho. A spiritual prequel to The Dino King, sharing various themes with the movie and also being directed by Han Sang-Ho, this film follows the life of a Tarbosaurus family made up of Patch, (the father of Speckles from The Dino King), his two siblings and their mother in prehistoric South Korea.

Journey back to the dunes of prehistoric Mongolia to find the owner of the largest claws of all time - Therizinosaurus. Presenter Nigel Marven's adventure covers vast nesting sites, skirts curious velociraptors and avoids the terrifying tarbosaurus so we can come face-to-face with The Giant Claw.