Undertale: The Adventure of Sans Part 1: Chara's Return

One normal day in Snowdin, Sans the skeleton is bored, so he goes on a mission- to give Papyrus the ingredients to his spaghetti recipe. However, Papyrus, Frisk, and even Flowey and the rest of the gang are gone. Then, Sans spots a black shadow coming at him. It grows until it overtakes Snowdin. The leader of this shadow army is Chara. Will Sans survive Chara's treachery?