As Yusei tests out his engine, Jack and Crow look back on his previous battles to try to understand him. When they meet up with Yusei, he suspects that Yliaster is the one behind Ghost and is planning something big with the WRGP. He also tells Jack and Crow about Accel Synchro. They become determined to learn this new move, which would require a new engine. Meanwhile, a mysterious person washes up on the beach.