“When the high school band is captured by deranged serial killers, A shy tuba player must use his skills as an eagle scout to survive an online game of kill or be killed.”

Interesting ... original ... but I don't understand why the band has been kidnapped, nor the relationship between the kidnapping and the online game - or how an online game can result in real world consequences.

Personally, I liked the idea of a tuba player. I imagined the fat kid who usually get picked on. For once the perfect bully victim was the hero. Not very physical, but smart and kind. "Piggy" (see Lord of the Fly), saves the day, gets the girl and become a national hero. Imagine "Samwell Tarly" from "Games of Thrones".

One liners:

I may be piggy, but you're toast. While killing one of the bad guy with a branding iron.
You know what you need to play tuba. Great lungs. While drowning one of the bad guy.
People don't know me, because I am hiding behind the tuba. What's you excuse? To a nasty kid who just lost the popular vote on Internet.

DPG says: "I changed it to piccolo player because it's a more diminutive token of the protagonist's personality and group status than a tuba. And small enough for him to carry with him as they escape."
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Richie V says: Solid idea, thanks. As an added bonus a piccolo could probably be shoved into a killers eye maybe into the brain. (At a key moment)