The Ending Of Blood Red Sky Explained

The turning point in Elias and Nadja's relationship comes before the plane actually lands in Scotland. Nadja has just been grievously wounded by one of the hijackers, and in one more act of filial devotion, Elias feeds Nadja his own blood, restoring her. But if you know anything about vampires, you know that's going to have consequences. Elias's blood keeps Nadja alive, but it also gives her a taste for her own son. Knowing this, Nadja starts to pull away. When she screeches and growls at him to scare him away, it's ironically one her most human moments.

Sadly, there's no coming back. After the plane lands, Elias tries to save his mother one last time. He finds her when she's feeding on a soldier, and this time she barely recognizes her son — that flicker of recognition is probably the only thing that keeps her from attacking the boy immediately. Elias was always the one thing tethering Nadja to her humanity. Now that her humanity is gone, she's just another vampire, and Elias is just potential prey. 

The ending isn't entirely bleak. When Elias the explosion, he's not just killing his mother, he's killing all the other vampires as well. In the end, Elias is able to do what his mother ultimately couldn't: stop vampirism from spreading any further. 

With that, Elias can move on with his life, which will no doubt involve tons and tons of therapy.