When the Hardys' wealthy neighbor is robbed, Joe and Frank are asked by their father to help solve the case.

"Leigh Fletcher: happily married stepmom to two boys goes missing on Monday. Kai Janssen: married to wealthy Dutch businessman Daan and vanishes the same week. Detective Clements knows that people disappear all the time--far too frequently. Most run away from things, some run toward and others are taken but find their way back. A sad few never return. These two women are from very different worlds. Their disappearances are unlikely to be connected....

Young pigeoneer Olive Bright has been conscripted, with her racing birds, to aid the fight against the Nazis. It's not the daring role she'd envisioned for herself, but her quiet little English village is not nearly as sheltered as she imagined... Returning to Pipley following her FANY (First Aid Nursing Yeomanry) training, Olive is eager to step up her involvement in the war effort. Her pigeons are being conscripted to aid the Belgian resistance,...

"After Caroline's dear friend is kidnapped...she has no choice but to work with Lord Valentine Thorn, the same man who broke her heart. Worse, when her actions put her father's business at risk, a marriage of convenience may be her only solution... Val, the new Viscount Wrackham, is in an untenable position: His father is demanding he find a respectable bride to secure the succession. Yet the only woman he's ever loved, Miss Caroline Hardcastle, is...

"North Korea, increasingly isolated from most of the rest of the world, is led by an absolute dictator and a madman with a major goal--he's determined to launch a nuclear attack on the United States. While they have built, and continue to successfully test nuclear bombs, North Korea has yet to develop a ballistic missile with the range necessary to attack America. But their missiles are improving, reaching a point where the U.S. absolutely must respond....

Still reeling from the heartbreaking death of their mother, a teenage girl and her younger sister find themselves hounded by a sadistic presence in their house and struggle to get their grieving father to pay attention before it's too late.

When Kath and her boyfriend arrive at a remote cabin in the redwoods, they find a mysterious young couple already there. But when her boyfriend disappears with the young woman, Kath becomes obsessed with finding an explanation.

In March 1986, eight months after the events of season 3, several Hawkins teenagers are killed in mysterious ways by a powerful being that lives in the Upside Down, Eleven goes to a secret facility in Nevada to help regain her powers, and Hopper and his fellow inmates in a Russian prison camp battle a Demogorgon that the Russians have captured.