Robotnik is trying to take over South Island once again. Our blue little hero decides to stop him, while also collecting all the chaos emeralds in his free time. A glitch which allows Sonic to skip the cutscene after most bosses helps him to proceed even faster to the following zone.
The goal of this TAS is to beat the game with the best ending, which requires collecting 5 emeralds throughout the game, causing a 6th emerald to drop after the final boss.
This run improved the predecessor movie by 00:33.06 seconds. The main timesave comes from lag reduction, but a few seconds were saved thanks to other tricks, techniques and routing.