Batman. What happened to the crusader in the mask?

He is the defender of Gotham. Its vengeful spirit. His dark knight. For many years, he alone wages the war for the purity of the streets of his hometown. But today this war demanded its last - and the largest - victim ...
Batman himself.
A crusader in a mask lies in a coffin in a criminal alley, in the very place where he was born. The best friends and worst enemies gathered around him to say goodbye. And everyone tells his story about Batman, about how he lived and how he died.
Like a shadow in the night, a dark figure watches this sinister farewell. She knows that these contradictory stories have nothing to do with the truth. And until the night ends until the coffin cover will forever outline Batman from this world, he must answer the main question: what happened to the crusader in the mask?