When his estranged brother Martin resurfaces, crime scene cleaning company owner Jean is pulled into a dangerous world of mobsters and dark secrets.
Martin continues to cause tension in the Bastiere household, while both he and Jean are pulled further into the world of crime boss Nelson Clay.
Jean is shocked when Nelson reveals his first cleanup job, and he misses a crucial appointment with Julie. Martin makes plans to flee from London.
Nelson calls upon Jean to clean up after a politician's drug-fueled tragedy. Julie opens her business. Jean discovers a terrible secret about Victor.
When Jean takes a stand and refuses a cleaning assignment from Nelson, Martin tries to protect him but only gets them both in deeper trouble.
The past catches up with Martin while Jean finds a potential ally in a new senior law enforcement officer. Julie receives an unexpected commission.
Hoping to end his partnership with Nelson, Jean confides in DCI Squire. Julie digs deeper into Jean's secrets. Martin starts an ill-advised affair.
When Maureen suffers a tragedy, Jean offers to help by using his skills. Victor discovers Martin's secret. Maddy starts a risky online friendship.
Jean wants to return to normal, but Julie has other plans. Maddy's online friendship leads to big trouble. Martin decides that Victor must die.
Jean and Martin frame Victor, hoping Nelson will kill him. As Julie prepares to leave London, Martin reveals a secret about the past.