Awe-inspiring in its suddenness, like a ghost terrifying people in the endless voids of space - a ship that disappeared under mysterious circumstances tens and hundreds of years ago. Its crew is considered missing, but no one has ever boarded it. It is like a comet, an asteroid or an interstellar object, overgrown with growths of gas and dust, and other space debris. One can only guess what places it has visited. But something else is frightening, as if led by someone or something, it always returns.