Black Sash follows the lives of Tom Chang (Russell Wong), a former Hong Kong cop who was framed by his partner and now runs a martial arts school, and his students, Allie Bennett (Sarah Carter), Bryan Lanier (Ray J), Tory Stratton (Melissa Peregrym) and Trip Brady (Corey Sevier). As Tom rebuilds his life, he seeks to improve his relationship with his estranged daughter while his students know they can always turn to Tom when they're in trouble.