When you open the chapter, there are always the usual two things to do. First go to the Engine Room and plunder the four new chests there, then head to the Cabin and rest up there for the scene for 100% completion. Then head to the Bridge for a scene and go to the Engine Room after. At the very end of it, as you try to U-turn back to the elevator, Buddy will appear and converse with you regarding the history of the Celsius. That’s about it. When you’re ready, head to the Bridge and take on the new missions.