The story traces the life of a drop of water from the ocean, through evaporation into a beautiful cloud, and her travels through the sky. When she falls into a dirty river or bay it makes her sick, and she is happy to return to the clean ocean. This time she freezes into a beautiful snowflake. She lands on a tree, melts, and travels down a pretty stream into a water purification plant. She then travels through a long pipe into a glass of water drunk by a small child. After going through the child's body, hydrating him, helping him to digest his food, and cleansing his body of things that could make him sick, she goes through the toilet back into a water purification plant that removes the bad things from her. Finally she travels through a beautiful river back into the ocean, where she begins all over again.