James Purefoy stars as William Travers, a criminal barrister who is recovering from a traumatic series of events that have shaken his belief in the legal system 　　On the surface, Travers is a picture of success an accomplished criminal barrister happily living with his wife played by Dervla Kirwan in rural Suffolk 　　However, Travers is still recovering from events in his past when he is drawn into a case that involves his old friend Martin Newall Nathaniel Parker , who faces conspiracy and murder charges while at the same time being investigated by a vicious and vengeful detective DS Mark Wenborn Creed Miles 　　The five-part series from acclaimed writer Anthony Horowitz Collision, Foyle s War is a story of friendship, conspiracy, betrayal and murder as well as a critical look at the way the legal system operates