Spike was once a complete puzzle. All of his pieces fit together perfectly and he fit into life's puzzle perfectly. Then, he lost something, or more specifically somepony. One does not stay the same after losing a special piece of them.
Fleeing Equestria for a crime he didn't commit, Spike finds himself on a magical island filled with dinosaurs. It is up to him to save the island before it is completely destroyed.
I never really liked the episode Stare Master. After I saw it, I always wondered what Spike was doing when Twilight turned to stone, almost kind of hard to watch. Well here's my take on it.
Sometimes, we are not as strong as we believe ourselves to be. Some things may better remain shrouded by night, where others should be revealed regardless of time.
It takes place after Twilight forgives Trixie for what she did in the episode "Magic Duel", and Spike doesn't buy it. Twilight learns from her friends how Spike really feels for her and now she has to fix it.
After going through so much, it's nice to have some quiet times. But quiet does not mean uneventful. Even in times of peace, ponies change, ponies grow, and ponies learn...