Not certain how this occurred but the light powering my storage room went out several months ago and I went to replace it but nothing worked... Well after several tries I finally decided to open up the wall and use my tester...I have now come to the realization that the hot is no longer so... I'm not certain how this could be but I frankly could care less...I just need to know how I can get the situation remedied... Will I have to run an entire new set of wiring from the wall of the storage room or can I possibly tap from the adjoining wall that goes to the basement lighting? Thoughts... Here are a couple pics of what I am working with if that helps

