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A cleaner of crime scenes is pulled into London's criminal underworld by the actions of his irresponsible older brother.

The brothers are forced into a dangerous partnership with Nelson Clay; Martin creates tension at home and in the neighborhood; Julie decides to take control of her future.

Nelson reveals details of Jean's first clean-up job; Martin makes plans to leave London after learning that French gangsters are following him.

Nelson calls on Jean when a politician's drug-fueled night with an escort ends in tragedy; Maddy plays truant on the same day Julie opens her new business; Jean discovers a terrible secret about Victor.

Jean takes a stand and refuses to do a requested clean, when Nelson pushes the boundaries too far. Fearing retaliation, Martin takes steps to protect them from Nelson, but ends up getting them into even deeper trouble.

Martin's past catches up to him; Jean finds an ally in new Detective Chief Inspector Squire; Julie receives a commission from an unexpected client.

Jean hopes that DCI Squire can help him break his partnership with Nelson; Martin begins an ill-advised affair; Julie investigates Jean's secrets.

Jean uses his skills to help Maureen through a personal tragedy; Victor learns Martin's secret; Maddy is intrigued by an online friendship; Nelson plans to kill Jean in the woods.

Jean wants things to return to normal, but Julie has other plans; Maddy's friendship with Steven leads to trouble; Martin makes a decision about Victor's fate.

Jean and Martin devise a scheme to have Nelson kill Victor; Julie makes plans to leave London; information comes to light about the death of Jean and Martin's father.