After settling in Green Hills, Sonic is eager to prove he has what it takes to be a true hero. His test comes when Dr. Robotnik returns, this time with a new partner, Knuckles, in search for an emerald that has the power to destroy civilizations. Sonic teams up with his own sidekick, Tails, and together they embark on a globe-trotting journey to find the emerald before it falls into the wrong hands.

Two federal agents from two different continents, and two different mindsets, must work together to investigate when wreckage from a destroyed alien spacecraft has mysterious effects on humankind.

Bill Williamson is back, alive and well and doing a recon mission around D.C. This time he wants to cause a major population disruption within the USA which result in devastating consequences reverberating throughout the world. His new mission this time to bring down The President of the United States and his Secret Service detail. Bill brings with him all the freak-in havoc and acidity of the previous 2 movies.

A female police detective returns to work after suffering PTSD from a previous case, only to have her teenage daughter kidnapped by an emotionally disturbed parolee.