Following a job loss for his parents, the family resolves to travel around the world by boat—the "Peggy Sue"—for an entire year. What his mom and dad don’t know is that their teenage son, “Michael,” has managed to sneak their dog, “Stella,” onto the vessel, secretly feeding her digestive biscuits from their food stores! Naturally, this isn't something he can keep quiet forever, and it quickly becomes apparent that he doesn't quite possess the maturity he projects; parental directions seem more like suggestions to him. This realization hits hard when a storm capsizes the boat, sending both Michael and Stella overboard onto a remote island. With no food or water—and intense heat beating down—their survival seems unlikely—until they wake up to find sushi and fresh coconut milk placed on the log where they’d taken shelter. Perhaps this island isn't as dangerous as he initially assumed? The jellyfish, however, seem determined to cause him trouble, which is how he encounters the person who left the food for them – an elderly man who has clearly been living on the island for a considerable time. Slowly, these two individuals—who don’t share a language—begin to develop trust and “Kensuke” starts sharing his personal beliefs with the boy as they work together with the natural environment in what becomes a very appealing haven. Initially eager to be rescued, does he still feel that way? We get some insight into the history of this island's only human resident, which adds both depth and sadness to the depiction of two characters who are easy to connect with, and the animation style brought back memories of "The Snowman" (1982). With a suitable musical score by Stuart Hancock, I considered it to be a brief, charming, and pleasantly touching story about gaining some understanding of independence and lessening one’s sense of self-importance.

Source on TMDB