Fast forward 100 years: Climate change. Water is scarce. An alien ship called Arcadia circles the sky day and night. All 17 year-old Ren Byrd thinks about is water. He aches for it. There is no hope of escape from his eternal thirst. Until Ren saves a small boy's life. The boy has a ticket from the lottery, allowing passage from earth to Arcadia. Soon Ren and the boy will head to Arcadia where Ren will be forced to decide does protecting humanity matter more than protecting those he loves.