About the Dragon Ball Super Manga Volume 21

In the wake of the commotion on Mt. Butterfly, Trunks decides to take a look into the data on the disc that he stole from Dr. Hedo's lab. However, the evil scientist intends to steal it back! And his genius plan is to create an android to infiltrate Trunks's school as a transfer student named Baytah. Meanwhile, the dastardly Red Ribbon Army is rising from the ashes and making new plans of their own…