It was a normal day in Equestria , sometime after Spike grows his wings, he and Smolder go out for some practice to help him get a hang of them, but what neither of them was expecting, was that another dragon who looks a lot like Spike to show up, and she reveals to them that she is Spike's long lost mother.
After Spike brings her to Twilight and the others, they all finally learn of Spike's past, but Spike's mother is wanting her child back after so long to teach him how to be a dragon, and Spike decides it's best to try and spend time with his mother to learn more about himself and his family. And even if Spike will have a lot to process, with his friends here to support him, he can finally know what really happened to him when his mother lost him as an egg..