Human remains are dredged up from the Clyde. They've been sleeping the deep, dark sleep for eighteen years. Suddenly Glasgow's underworld is buzzing with the news that the remains are those of 'Gentleman Joe' Strachan, Glasgow's most ruthless armed robber. When Strachan's daughters hire Lennox to find out who's been sending them cash every year on the anniversary of Strachan's biggest robbery, his instincts tell him the job spells trouble and will throw him back into world of the Three Kings - the crime bosses who run the city. But he takes the job. And soon learns that ignoring his instincts may cost him his life.