Yeah, it's the classic "military finds something with potential but also highly dangerous, experiments on it, eventually it goes awry and the local populace of a small town nearby pays the price amidst strange and stranger happenings, it's up to a gang of misfits to solve and save the world from the supposedly evil alien plant of doom".
I'm guessing in the end they will also go the route of the plant leader being but a misunderstood alien who just wants to get out of Earth/go back to its home planet/live in peace with humans but is trapped by the military and has thus started fighting back for its your survival and freedom, thus the brainwashed sims.
