Government agent Allan Grey (Starrett) decides to go undercover to catch a gang of firearms smugglers. Grey poses as an aspiring prizefighter, catching the eye of gang leader Douglas Worthington (Madison), who decides to take Grey under his wing and into his confidence. However, complications occur when Grey falls for Worthington's sister Sondra (Cherrill), and he must choose between his duty and his love for Sondra.
