Join Grass Hopper, an inquisitive fish from Hume Lake as he seeks answers about life, death, and everything. See how he gets ensnared in a crab made underwater rocket that boosts him up and out of his world and into adventures where he meets other creatures and is reunited with his lost brother. Watch him save the day and help others vanquish an old enemy. He eventually returns home to the lake but is soon involved in another adventure to the stars.