What Could Have Been Can

Mistral had many times thought about breaking the promise, since she had made it when she was deadly ill and close to dying, so it didn't count in her opinion, but her husband had out-smarted her by including Asgore in the promise and by writing it in his will. Therefore Mistral lived in the castle in the underground with Asgore, only getting information of the underground through the leader of the royal guard, but it was also the only information she needed to know to ensure that 'they' were safe.

Until a human falls into the Underground and Mistral sees herself forced to confront them, but this very action will ultimatey break the promise she made long time ago...