If you completed all actions before the guests die, a cutscene will be triggered. During it Clay will save Trinity. Once all is done, both of them will take off their masks. The woman from the tutorial will appear and provide you with Trinity's mask.
From now you can hear all the whispers. This means that if someone is saying something and it appears as stars (****), by pressing space you can see exactly what he is saying.
The day will restart and your task will be to save the next person. Description of further challenges can be found in the next chapter of the walkthrough.