Tom and Jerry happen upon a mysterious glowing egg. Little do they know, this egg was stolen from a very large fire breathing dragon! In short time, baby Puffy hatches from his egg and takes Tom as his mommy. The angry mama dragon wants her baby back, but she's not the only one a powerful witch named Drizelda captures the baby dragon for her own wicked plans! With the help of powerful allies and animal friends, Tom and Jerry must fight tooth and claw to stop the witch and get the baby dragon back to its mother.