The actions described below will help you save the woman. You must complete a few tasks in a very short time. You must enter the secret chamber before Willow Blue in order to save her.
Enter the room on the left after starting the day. Pick up the charm lying on the ground.
Go back to the corridor with the clock and use the charm on one of the fish marked on the picture. Then use the door on the right and pass through the room with the bell to the corridor.
Now go to the room in which you found the clock key at the start of the mission.
Use the talisman on the second fish and return to the corridor.
From there you must go to the room with paintings and then to the secret chamber. The entrance is blocked by a giant skull. It will fall back when you show the sated hungry charm. Remember that you must interact with two fish.