When he was just ten years old, his life had changed since he read a letter that was placed in a secret compartment, on the floor in his room. It had him changed from a regular kid to a responsible young man. He held himself together well, but there is still one thing unanswered. Where is his father? The only thing he knows is that Dr. Blakk was the one who had him and his dad had a promise, that when he turns 15, then he and his dad would go down to slugterra. Unfortunately that never happened. But he still managed to go down there, and save slugterra from Blakk. But now that's about to change.

Deep down into the underworld, there are hundreds of darkbane walking around making sure everything is going good. Especially since is down there. But there is also another person down there. And is well known to be "dead", Will Shane, behind weird looking prison bars.

Day and night he has been worried about how slugterra has been doing, and his son. It has been almost six years since he told burpy to find him and give him the note that he left for him. Then Will started a conversation finally after all these weeks of seeing him stuck there.

"So Blakk, how did you end up down here, I never thought I would see you again."

"Well, Will Shane, your lame excuse for a very well behaved child has brought me here, long story short."

"Well, that's him, always trying to do everything right. What have you been doing with him up there anywhere."

"Well, lets just say that he'll be down here, or gone for good." This got the prisoner fired up and shouted,

"If you touch my son I will-!"

"Do what, kill me?"

"I might just do that. Do anything to him and slugterra, and I'll make sure you will go straight to prison and never

escape. I promise you that!"

"We'll see about that."

That leaves Will Shane by himself angry hitting the metal bar. Thinking to himself that he shouldn't worry about them both, they are alright. But there is a new threat on its way to slugterra, and its something that no one has ever seen. Then there is Dr. Blakk going into a huge laboratory with a huge goondoc slug, not normal, but mega MEGA morphed. What's different about this slug is that this one is like death bomb, this can cause earthquakes, fires, and nuclear gas to go all over the caverns of slugterra. Then there is thinking, the time has almost come.