Franky's Past! The Day the Sea Train First Ran!

When the foremen stumble onto Franky's concealed chamber, he panics that they will trample the memories stored there. That fear triggers an extended look back at his earlier life. The flashback covers his time as part of Tom's Workers and details how he and Iceburg, under the giant fish-man Tom, helped bring the Sea Train into being. The recollection traces the project from a desperate idea meant to lift a failing city to its triumphant first run.

Franky charges Kalifa for hurting Mozu and Kiwi but is halted by Blueno's Tekkai, and Lucci stops the agents from killing him since they need him alive. Lucci exposes Franky's birth name, Cutty Flam, then reveals Iceburg is dead and demands the Pluton plans. Enraged, Franky fires his hand and is smashed through a wall, exposing a secret room of drafting tables, nameplates and a treasured photograph. As Lucci reaches for the picture, Franky's memories take over, returning to a young version of himself crashing his Battle Franky into Water 7.

In the flashback, a judicial ship arrives to try Tom for constructing the Oro Jackson for Gold Roger, a crime carrying execution at Enies Lobby. Tom wins a reprieve by pitching the Sea Train, a steam-driven vessel that rides submerged tracks, scares off Sea Kings with an underwater siren, and links distant islands. Judge Jorge grants him ten years of probation to finish it. The build endures Sea King attacks and broken rails before the train, Puffing Tom, completes its joyous maiden voyage. The episode introduces Tom, Jorge and Scrap Island, adapting chapters 352 through 354.