Hint 1
Hint 2
Hint 3
What hidden places, you ask? Well, have you looked at the pictures on Dagny's phone yet?
Dagny's gone! What do I do?
The last picture on Dagny's phone shows a blank wall on board the ship, and Dagny is too practical a person to keep a picture like that. There must be something behind it --
-- if we could just find it.
How do I find the door to the secret room?