Challengers—Blurring the Lines of Platonic and Romantic Love
What happens to an inseparable bond when love for competing morphs into competing for love?

Petros, the little son of a fishing man makes a very special finding. While playing at the beach he discovers a message in a bottle. With the help of its Grandpa he succeeds deciphering the paper. "Atlantis is a lost city," he explains to his grandchild. "Since eternal times humans try to find this city, but up to now nobody succeeded." Petros, his dog Uzo and Grandpa start an adventurous journey after the lost city.
What happens to an inseparable bond when love for competing morphs into competing for love?
The sequel to the 2010 live-action movie focuses on sibling rivalry.
A pampered dog who gets lost and has to learn to live on his own while being flexible with surroundings.