Steve and his friends compete in a science fair in Washington D.C. where Steve searches for a secret lair beneath the Washington Monument, but when he runs into Perses's minions, Steve and his friends must work together to stop their evil plan.

When twelve-year-old supervillain wannabe Steve and his friends find themselves stranded on a planet with an alien, they must rely on Steve's sister Eve to rescue them and stop an intergalactic threat--but this might be her chance to prove she is the true supervillain in the family.