A full length anime feature, Eureka Seven: Good Night, Sleep Tight, Young Lovers is based on the same characters as the sci-fi tinged Eureka Seven TV series, but creates a new mythos for the story. Inseparable friends as children, Renton and Eureka were both changed forever when she was mysteriously taken away. Vowing to rescue her one day, Renton grows up to enlist in the military and soon becomes involved in the elite bio-armor system known as Nirvash. He'd always hoped that becoming a hero could help him one day to track down his long-lost friend, but Renton soon discovers that Eureka is tangled up in the Nirvash project as well - in ways he never could have imagined.