Just one moment can change everything

Zim, gaz, and dib are all in high school now and zim has grown quite tall. But when zim finds out his missions fake the tallest order him to destroy himself, who is he to argue? But what if someone was in the lab and heard everything? ZaGr may be OOC. Also my fist Inavder Zim story so please go easy on me. I don't own Invader Zim or any of the Characters. Enjoy!