Borrie Veldt (Christo Niehaus) is an ordinary 12-year-old boy by day and secret crime fighter by night. Disguised as Die Swart Kat (Black Cat), using his BMX he solves the crimes that confuse his detective father (Kerneels Coertzen).

Die Swart Kat always leaves his calling card on the scene in the hope that Die Swart Kat he will get recognition for his daring and brilliance. Unfortunately, the card never gets discovered and to Borrie’s great frustration, the honour of catching the villains usually goes to the young and dashing detective sergeant Kobus Bril (Visser du Plessis), his sister Rienie’s (Michelle Botes) boyfriend.