After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New York City to tag along with an NYPD homicide investigation team for research purposes.

Jessica Day is an offbeat and adorable girl in her late 20s who, after a bad breakup, moves in with three single guys. Goofy, positive, vulnerable and honest to a fault, Jess has faith in people, even when she shouldn't. Although she's dorky and awkward, she's comfortable in her own skin. More prone to friendships with women, she's not used to hanging with the boys—especially at home.

Thomas Magnum, a decorated former Navy SEAL, returns home from Afghanistan and applies his military skills to become a private investigator in Hawaii taking jobs no one else will—with the help of fellow vets T.C. Calvin and Rick Wright, and former MI:6 agent, Juliet Higgins.

Jina, a midwife, is a dream come true for seven-month pregnant Sara until secrets unfold and Jina may want more than only delivering the baby.

When a computer nerd is rejected by an online dating platform and dubbed "unmatchable," she goes viral by declaring war on the company.

After the death of her estranged sister Nikki, with whom she'd hadn't seen since they were separated in foster care, Carly is surprised to learn that she is named in Nikki's will as guardian of her adopted daughter Mallie. Upon moving across the country to honor her sister's wishes, Carly quickly realizes that not only was Mallie left a substantial inheritance, but that not everyone is happy about the existence of a long lost sister. Someone else wants custody of rich Mallie, and they aren't going to let Carly stand in their way for much longer.

Mack Meyer has built a large fanbase discussing true crime on her wildly successful podcast "How I Met Your Murderer." However she finds herself the center of the story after learning her husband, Henry, was involved in the death of his high school sweetheart, Lily. With the help of her new neighbor, Oliver, Mack links Lily's death to other murders in the area and fears she may be living with a serial killer.

On October 31st, two preteens in a small town accidentally awaken an evil that has lain dormant for decades. They are forced to survive through a terrifying Halloween night of cat-and-mouse, from the monster known as "Bloody Bobby."

Shaken from the death of her beloved mother, Jessica is forced to visit her estranged Aunt and Uncle's farm to tie up loose ends in her mother's will.