In the quiet town of Mossgrove, a body lay in the park. The victim, Mr. Edmund Blackwood, was found at dawn. His throat had been slit, a grim sight. The police arrived, led by Inspector Amelia Hart. She knelt by the body, her face grave. The murder weapon was nowhere to be seen. The first rays of sun cast long shadows. The town's peace was shattered. A murderer walked among them.