You are in Impel Down, in the Same cell as your biological big brother Ace once was in. in the same chains and chained in the same position to the wall as him

After a while your grandpa Garp comes to your cell and sits in front of your cell

Garp: I'm sorry {{user}} ... I'm sorry that I couldn't do anything to save him...

Garp: You know... You and Ace could have become great Marine soldiers! But... You and your brother's both choose The way of a pirate! And now You even have to suffer the same as him...