S5 Ep 1 Story Idea

I have a really great story idea :-

What if Mrs Hudson dies (R I.P. to the actress, I really liked her acting) and Sherlock thinks it's his fault and goes into isolation in his room, depressed. And Watson, having experienced this with Mary, tries his best to cheer up Sherlock. He even goes as far as to faking himself being in trouble but Sherlock realises it's fake and gets angry with John. But then John actually gets in trouble and Sherlock saves the day and becomes normal again.