JamesPurefoystarsasWilliamTravers,acriminalbarristerwhoisrecoveringfromatraumaticseriesofeventsthathaveshakenhisbeliefinthelegalsystem.Onthesurface,Traversisapictureofsuccess;anaccomplishedcriminalbarristerhappilylivingwithhiswife(playedbyDervlaKirwan)inruralSuffolk.However,TraversisstillrecoveringfromeventsinhispastwhenheisdrawnintoacasethatinvolveshisoldfriendMartinNewall(NathanielParker),whofacesconspiracyandmurderchargeswhileatthesametimebeinginvestigatedbyaviciousandvengefuldetectiveDSMarkWenborn(CreedMiles).Thefive-partseriesfromacclaimedwriterAnthonyHorowitz(Collision,Foyle'sWar)isastoryoffriendship,conspiracy,betrayalandmurderaswellasacriticallookatthewaythelegalsystemoperates.