Kakashi, Naruto, Sasuke and Sakura are given a mission to find a missing man. When they find him, they discover they’ve been set up.
First off, when should you watch it? Well, it’s set shortly after the Prologue – Land of Waves arc (episodes 1-19 of the first series), but it will give some spoilers from the Chuunin Exams arc (episodes 20-67 of the first series). That being said, it’s Sasukes flashback so it also has spoilers from the Fated Battle Between Brothers arc (episodes 134-143 of Shippuuden) also, a slight spoiler from about episode 32 on (of Shippuuden).
Okay. Now, the art kind of annoyed me. It was like watching one of those annoying video game clips that give you those annoying back stories that no body actually likes dealing with. It was interesting enough though I guess. You got a little into what Sasuke was thinking at the time.
You can probably skip it. It’s not the best out there. It’s ok though so it’s not like it’d really be a complete waste of time.