Four 15 year old boys join a secret anti-terrorist association, who hunt down terrorists for a living. Now they must protect the streets of Seattle from a pernicious terrorist and his nefarious army of agents before it’s too late.

New logline:Four average-joe teenage boys join a secret anti-terrorist association. Now they must fight against terrorism plots on the streets of Seattle from a pernicious terrorist and his nefarious army of agents before it's too late.

Yes, that's what I was trying to say. But you Richiev has good advice too.

You should also give a one (or two word) description of the teens to let us know why they would be recruited. For example: "Four teen-age hackers join a secret anti-terrorist unit..."

Just saying teen doesn't tell us anything about who they are.

Also, What's the bad guy planning, that they must stop?

Adding those two Elements will help your logline.

Hope that helped, good luck with this!