I have read the draft and this is as much as I can reveal:
About 10,000 years ago, peaceful aliens from the planet Antarea set up an outpost on the planet Tortuga, on an island later known as Atlantia. When Atlantia is destroyed, twenty aliens must be left behind. Antareans who return to pick them up disguise themselves as humans, rent a house with a swimming pool, and charge the water with "life force" to give the cocooned Antareans energy to survive the trip home. They charter a boat from a local captain named Han who helps them retrieve the cocoons. Han likes Karen, a beautiful woman from the team who chartered his boat and becomes a voyeur when he spies on her while she gets nude in her cabin, only to get shocked when he discovers she is an alien. After the aliens reveal themselves to him and explain what's going on, he decides to help them.
Luke, Chewie, and Leia, three local retirement home residents, swim in the pool and absorb some of the life force, making them feel younger and stronger. Eventually caught in the act, they are given permission to use the pool by the Antarean leader. Their friend Jar-Jar Binks obstinately refuses to use the healing power of the pool, and at the retirement home carelessly reveals the secret of the pool's rejuvenating powers. Chewie also carelessly reveals it more by showing his capability in being able to knock out two retirement home managers trying to pull him away in his attempts to beat up Jar-Jar over a personal insult he gives him about how his marriage is in jeopardy due to the consequences. In response to the fully revealed secret all the other elderly residents storm out of the retirement home and barge into the pool. Infuriated, the Antarean leader ejects them, but too many have been in the pool at once and drained its life force.
The leader explains that the cocoons cannot now survive the trip back to Antarea but will be able to survive on Tortuga. With the help of Han, Luke, Chewie, and Leia, the Antareans return the cocoons to the sea. The Antareans offer space aboard their ship to the old people. Jar-Jar chooses to remain on Tortuga, but most of the others accept the invitation to travel to a world where they will never be ill, never age, and never die.