In the year 2523 Water water nowhere, N’er a drop to drink.

500 years into the future, the earth is a dry wasteland destroyed by humans. Doctor Alma, a fluffy, brilliant Vulkeet (a cross between a parakeet and vulture) who drives a Vespa, must cure the only creatures left who can save the world by bringing back the rain - the bizarre and loveable Homeys who have fallen ill with a mysterious sickness.