Fares and Celine are typical 13 and 14 year old siblings who act like any other teenagers. Both of them live with their grandfather Dr. Jad, the obsessed astronomer who believes that there is life on other planets and who spends most of his time locked up analyzing and finding new theories. Till he meets Al! Al is a hygienic obsessed alien, who crash landed on Earth thriving for any kind of company, and was taken by disappointment; his anguish is generated from how human beings are treating mother nature and filling it with toxic industrial waste, he finds himself encountering a choice, where either he flies back to his exile leaving such a filthy planet as it is, or staying to fight for Mother Nature. Along with Al came his four main nature elements (fire, earth, wind and water). Together they have decided to stay and start their fight to save Mother Nature. Once Upon a Star is an adventure/Science Fiction series, which will take the audience through Al’s journey, transformation and struggle to win his fights against the villains and defend Mother Nature.