Dexy Morgan is a crimilalist specialized in blood traces that used to worked in the Mareami Police Department, now the the crime there are dropping he was transfered were his talent were required the most, Manehattan. But Dexy is in reality a serial killer with a code. Killing only those ponies he consider guilty, he´s now adapting to his new huntig ground and starts the persecution of his most evasive prey at the date. A mysterius Alicorn.