Isaiah 15 is a part of the Bible, which is a book that tells stories about God and his teachings. It talks about a place called Moab, which was a country that existed a long time ago.
In this chapter, the prophet Isaiah is talking about how a city in Moab called Ar will be destroyed. He explains how everyone will be very sad and upset because their homes and buildings will be destroyed. It will be a very sad time for the people of Moab.
Isaiah also talks about how the people will be crying and mourning for their loved ones who have died. He says that they will be very upset for a long time because they have lost so much.
Overall, Isaiah 15 is a sad chapter in the Bible that talks about a place that was destroyed a long time ago, and how the people who lived there were very upset about it.