England, 2003. Tom McIntyre is a worried man. Debts are piling up, his career is in free-fall, and his family life is under strain. Only his wife, Alison, remains unswerving in her support of him. Close to rock bottom, Tom clinches the deal of a lifetime and then tragedy strikes, putting everything Tom values at risk. In the aftermath, a toxic mix of grief, substance abuse and blame leads to different paths for the family. Duplicity is a story of lost innocence, radicalisation, and family bonds. Can grief, love and hate be reconciled? And can Tom repair his fractured family?