This dark tale tells the story of what really happens every year when Santa visits the world. Based on a poem by Neil Gaiman. This dark tale tells the story of what really happens every year when Santa visits the world. Based on a poem by Neil Gaiman. This dark tale tells the story of what really happens every year when Santa visits the world. Based on a poem by Neil Gaiman. This dark tale tells the story of what really happens every year when Santa visits the world. Based on a poem by Neil Gaiman.