ASA Productions and Enterprises Pvt. Ltd.'s Horror Story is, as the title suggests, a horror story. A group of seven young friends decides to spend a night at the seemingly haunted hotel, The Grandiose. But what starts as an outing of fun and adventure in the empty, deserted and run-down hotel, soon turns terrifying when one friend is killed under mysterious circumstances. After the death, the remaining six friends realize that they are trapped inside the hotel inhabited by a ghost. Their mobile phones also stop working.
One by one, more friends keep getting murdered gruesomely. Every murder takes the remaining friends to the brink of despair but they try their best to remain together and escape. Are they successful? Do the friends, who are alive, manage to outwit the ghost? Or do they all die one after another?