The greatest adventure of his life begins for Checker Tobi on a pirate ship in the middle of the sea. There he discovers a message in a bottle containing a riddle. If he solves it, he will reveal the secret of our planet. An exciting scavenger hunt around the world begins! Tobi climbs the crater of a fire-breathing volcano, dives with sea dragons in the Pacific, explores the loneliest parts of the Arctic with climate researchers and ends up in India at the driest time of the year. In Mumbai, he becomes a Bollywood star before the monsoon transforms the megacity. Tobi finally realizes that he had the solution to the puzzle in mind throughout his journey.

In Curious Tobi and the Treasure Hunt to the Flying Rivers, adventurer Tobi needs to find his best friend from childhood Marina, the only person who can help him unlock a mysterious treasure chest. Tobi’s search for Marina kickstarts an adventure that takes him to the greatest and most stunning places in the world. Always with one goal in mind: solving the riddle of the treasure chest and finding the mysterious flying rivers.

Tobi revisits an old childhood riddle: Who leaves the deepest traces in the earth? His search takes him to places like Madagascar, Spitsbergen, and Mexico, where he uncovers what connects them and finds the answer he was missing as a child.