Elridge Park is entirely unnoticed in London. It fails to appear on maps or attract the inhabitants of a busy metropolis. Some might say it doesn't want to be found. At the end of the Great War in 1918, young Jacob Patterson goes to London to find his father. Dodging attacks from bloodthirsty monsters, the boy takes flight to the green space, only to be trapped inside by an invisible barrier. He meets four bizarre extraterrestrials, each marooned...