I'm not sure what you've done so far, so here's what you need to do at the beginning of chapter 2.

  • Talk to Shinra, Brother, and the rest of the Gullwings.

  • Head towards the Cabin and talk to Daraya (the drummer).

  • Agree to sing, then push the musicians into the lift at the other end of the corridor.

  • ~Concert sequence~

  • Wake up in the Cabin, then head to the Engine Room to open the treasure chests.

  • Go to the Bridge and choose who you want to give the Awesome Sphere to.

  • ~Delivery sequence~

  • Leblanc robs the ship -> begin hunting for Syndicate uniforms.