Billy Baston who is Shazam (who is also called Captain Marvel) alter ego was running from bullies gets on train something magical happens and lightning and voice comes “Billy Baston I chose you…. Train land in cave where the Wizard the real Shazam who was dying grants him the power of Shazam. I mean his powers. By saying the Wizard name ‘Shazam’ Billy Barton transform into a magical, muscular adult Superhero Shazam.