"Eureka Seven - good night, sleep tight, young lovers" is a 2009 anime film that serves as a reimagining of the original "Eureka Seven" series. The story is set in a dystopian future where humanity is under constant threat from mysterious entities known as the EIZO. The narrative centers on Renton Thurston, a young mechanic, and Eureka, a enigmatic girl with a deep connection to the EIZO. Renton lives in a world where his father, Adroc Thurston, is celebrated as a hero for his role in combating the EIZO, though Renton himself feels overshadowed and disconnected from his father's legacy.

Renton's life takes a dramatic turn when he encounters Eureka, who pilots a powerful mecha known as the Nirvash. Eureka is part of a military organization called Gekkostate, which opposes the oppressive government and seeks to uncover the truth behind the EIZO. Renton joins Gekkostate, driven by a desire to protect Eureka and to find his own purpose. As their bond deepens, Renton and Eureka discover that the EIZO are not merely enemies but are tied to the very fabric of their world, with Eureka herself being a key to understanding their nature.

The plot explores themes of love, sacrifice, and the struggle for freedom, as Renton and Eureka navigate a world filled with political intrigue, military conflict, and existential threats. Their journey is marked by personal growth, as Renton evolves from a disillusioned youth into a determined protector, while Eureka grapples with her identity and the weight of her responsibilities. The film culminates in a climactic battle that forces both characters to confront the true nature of the EIZO and their own destinies, ultimately leading to a resolution that redefines their world and their place within it.