An epic, all new reimagining of the classic 1980s animated series, "ThunderCats" tells the story of a hero's journey to fulfill his ultimate destiny. On Third Earth, the kingdom of Thundera is being threatened by the evil sorcerer Mumm-Ra, and Lion-O, the young heir to the throne, embarks on a great quest to take his rightful place as king. The unlikely champion must work with his faithful comrades Tygra, Cheetara, Panthro, WilyKit, WilyKat, and his loyal pet, Snarf - who join him on his journey - to save their world from darkness.