Mr. Clean and his pluggers with their monster toxites just got way stronger. Clean just created a breed of half toxites half human, the Sweepers. With the Manualis Custodeum, Spencer and Daisy must unlock the secret of how to bring back the witches if they want to have any chance of saving education. Read Strike of the Sweepers to find out if they unlock the founding witches and if they can still beat Clean, even with his Sweepers.