Leeds police constable Jo Gillespie (Sheridan Smith) is devastated when her husband, undercover officer Ryan (Kenny Doughty), is killed in suspicious circumstances. As she battles to stay strong for the benefit of daughter Melly (Honor Kneafsey) and stepson Hal (Oliver Woollford), Jo is urged by her bosses, DCI Will Hepburn (Douglas Henshall) and Chief Constable Carolyn Jarecki...。Miriam Gordon lives in a fog of grief while working in a downtown public library branch. When a burgeoning love-affair coincides with her receiving a series of oddly threatening letters, Miriam's sheltered existence is cracked open.。1924年10月,直奉第二次大战爆发。就在直系军阀吴佩孚与奉系军阀张作霖在山海关激战时,吴佩孚所属第三军司令冯玉祥却突然挥师入京,并于22日深夜,发动政变,包围总统府,囚禁了大总统曹锟。曹锟身陷囹圄,吴佩孚紧急从山海关前线驰援,但是精锐主力却被围困天津,孤立无援。群龙无首,山海关前线十万大军快速崩溃,最终吴佩孚不得不乘船南遁,直系政权由此覆灭。战争尽管结束,但北京政局却面临着重重危机。直奉大战后,奉军开始大举入关,早已准备问鼎中原的张作霖与冯玉祥在直隶地区展开争夺,角逐北京政权。。