The unit specializes in the investigation of serial murders and is led by Van der Bijl, a former murder and robbery detective who gained fame for his handling of several high-profile cases. Each episode focuses on a serial killer. The main character, Colonel Piet van der Bijl, also known as Die Byl, is loosely modeled on the famous ex-detective Piet Byleveld.

A South African series based on classic British whodunits like Midsomer Murders and Lewis which follows the adventures of The Boland Investigative Unit, a fictitious elite detective unit that investigates murders in the Cape Winelands.

Deep in a lush valley are four wine farms and four wine families. Four families surrounded by mystery, love... and murder. Four wine farms - Rossow, Le Fortune des Vins, Smoorberg and Mount Jolley - exist in a crease in time in their valley, almost completely untouched by the outside world. Until the winemaker on Rossow, Deetlef Koen, is murdered.