The engagement of effervescent Mally Lee to handsome, well-connected Roger Mooring is not going well. They quarrel constantly and Mally's idea is to spend time apart and delay the wedding. She has no money of her own and hopes to find a job, which materializes when Sir George Peterson hires her to be a governess to his daughter. She happily heads to London and all is well until Sir George and his odious secretary, Paul Craddock, accuse her of the theft of a diamond brooch and an important paper.

Sally Meredith's young life has been full of adventure. As a suffragist, she fought for women's right to vote. She drove an ambulance in France during the war. And she's already had a proposal and a broken engagement. But the past few years have been deadly dull, taking care of a cranky relative and now living alone in a quiet village. So when her eccentric uncle Fritzi arrives with the tale of his most recent invention - a deadly gas that nations are striving to get hold of - she's intrigued.

Jane is broke, she's just lost her job and her landlady has kicked her out. When an amorous young man approaches her on a park bench it soon becomes clear that he has mistaken her for her cousin Renata. Their mothers were identical twins and even though Jane has never met her, Renata's fiance insists they too are identical. He's desperate. It seems Renata sleepwalked into a meeting of her father's friends and overheard their criminal plans. She's lied about hearing anything but they doubt her story and are holding her prisoner.

Twelve-year-old Peter Waring is an orphan with an assortment of relatives who don't quite know what to do with him. But Peter's concern is for Rose Ellen, the little girl his mother took in before she died, and for whom none of his relations feel any responsibility. They are however intrigued by Peter's legacy. His father had hidden The Annam Jewel, a mysterious and priceless object that Peter will inherit on his 25th birthday. But Peter's first task is to rescue Rose Ellen from the wretched institution where she has been sent.

As a mute, burly German peasant is helping British soldiers move a fallen tree, he's struck on the head. When he regains consciousness he calls out to the astonished Major Manning, using his nickname "Monkey"—in perfect English.

Amabel Grey, a widow with a modest income, needs money. Fast. Her spoiled daughter Daphne has an opportunity to go with friends on holiday, and she's convinced it will end with a lucrative marriage proposal. But where to find 200 pounds? She overhears a client requesting the lawyer find someone to live in his Dower House for six months. The stipend is 200 pounds! And she knows the house, having visited 20 years before. The catch? Previous tenants have been driven away by strange happenings, and the village is convinced the place is haunted. The owner wants the rumors to stop.

Horace Manning, scientist, recluse and 'closed book' even to his friends, is found dead in his study at 4a.m., following a dinner in honour of his daughter's engagement. An ivory-handled carving knife rests between his shoulder blades as the houseguests gather round to witness the awful crime. The telephone line has been sabotaged - a calculated murder has been committed. Rewinding twelve hours, the events of the afternoon and evening unfold, revealing a multitude of clues and motives from a closed cast of suspects.

While hot on the heels of serial coupon-racketeer Gordon Ginner, Chief Inspector MacDonald of Scotland Yard receives word of an intriguing incident up in Lancashire – the summer cottage of local farmer Giles Hoggett has been broken into, with an assortment of seemingly random items missing which include a complete reel of salmon line, a large sack, and two iron dogs from his fireplace. What first appears as a simple break-in quickly spirals into a mystery of contested land grabs for fishing between farmers, made all the more enticing to MacDonald when a body is then found in the river.

Miss Busby helped Major Heathcliff Lennox solve a series of murders at Bloxford in the Cotswolds. Now, she finds herself drawn into a new murder, but this time, it's just her, and she must rely on her sharp mind and sharper wits to catch a Cotswolds killer, along with a handsome police inspector and a reporter who's keen to make her mark.

Lady Emily Hardcastle is an eccentric widow with a secret past. Florence Armstrong, her maid and confidante, is an expert in martial arts. The year is 1908 and they've just moved from London to the country, hoping for a quiet life. But it is not long before Lady Hardcastle is forced out of her self-imposed retirement. There's a dead body in the woods, and the police are on the wrong scent. Lady Hardcastle makes some enquiries of her own, and it seems she knows a surprising amount about crime investigation...

Orphaned cousins Jane and Lucilla, both 19, receive the exciting news that their guardian is at last allowing them to leave boarding school. But their rosy future is thwarted when they find he has made some bad investments and fled, leaving them with a cottage in the English countryside and a modest bank account.

Soon-to-be heiress Betty Stanhope is a runaway bride, but not for the usual reasons - she didn't flee because of a change of heart. Reluctant about the wedding at the outset, the dutiful Betty reaches the altar to find that her groom is a different man altogether and someone she's dreaded most of her life! Before the wedding can proceed, she is taken to a room to recover from her fainting spell.

Aunt Crete has spent a lifetime of toil catering to the needs of her family, especially her waspish sister, Carrie, and social-climbing niece, Louella. When a telegram from a nephew from out west announces his imminent arrival, mother and daughter hasten a trip to the shore to escape the "country cousin" who they are sure will shame them.

1917. American boys have joined the Great War in Europe. On the homefront, mysterious occurrences like ships catching fire and factories blowing up have people wondering: is this German sabotage? Hilda Lessing's family has been split apart due to the death of her father, and her uncle has found her a job doing housework on a friend's farm. Mr. and Mrs. Schwartz and their workers are German and a young train engineer whom she befriends on the way to the farm jokingly warns her to "Watch out for spies!"

Rachel Rainsford should be excited. She was on a train traveling across the US to a well-paid position as an old lady's companion. But after several hours spent with the man who hired her and is accompanying her on her journey, she's having doubts. His manner seems strange, and she may have acted too hastily in accepting a job so far from home. Meanwhile, in the parlor car, Chan Prescott overhears two men concocting a plan to abduct a young woman. When her name is mentioned, Chan recognizes it as the daughter of a former beloved teacher.