Zak Saturday and his parents, Doc and Drew are a family of world-saving scientists called "The Secret Saturdays." Living in a hidden base, they are part of a secret organization of scientists known as The Secret Scientists who protect mankind against the hidden and terrifying things of the world. In the series, folktales aren't just legends, but actual mysteries that the Saturday family must solve. Traveling all over the world, the Saturdays explore ancient temples and bottomless caves, and battle with villains which includes the evil V.V. Argost (who hides his evil plans under his TV show Weird World) and a masked mercenary, who specializes in the capture of cryptids, named Van Rook. Scouring the globe in search of cryptids, the Saturdays attempt to keep the existence of these unusual beasts secret, to protect both mankind and the creatures themselves. The Saturdays and their exotic cryptid pets are a loving bunch, trying to work through everyday family matters and squabbles in-between their adventures. During both seasons the Saturday family is on a race against V.V. Argost to stop Argost from controlling Kur, a mythical all-powerful beast that can supposedly raise a cryptid army.