A pregnant woman leaves her husband and moves to St. Elizabeth's, a Catholic home for unwed mothers in Kentucky, to begin a new life.

When twenty-three-year-old Sister Evangeline accidentally stumbles upon some mysterious letters exchanged between the late mother superior of her convent and the famous philanthropist Abigail Rockefeller, she is thrust into an ancient conflict between the Society of Angelologists and the monstrously beautiful descendants of angels and humans, the Nephilim.

When Father Anselm dies mysteriously while consecrating the host, Sister Agatha, a nun at the cloistered order of The Sisters of the Blessed Adoration in the New Mexico desert, finds herself the prime suspect in the crime.

Sister Regina, a teacher at St. Joseph's Catholic school in Browerville, Minnesota in the 1950s, and handyman Eddie Olczak, a widower with two little girls, must find the courage to follow their hearts when they realize they have fallen in love with one another.

After a life-changing journey to Ireland with Tom Kelly, Bernadette Sullivan finds refuge within the cloistered walls of a convent, but years later their past returns to haunt them, and they journey across the sea to find the son they had given up for adoption.

Startled awake by an unearthly voice that warns her that one of her loved ones is in danger, eleventh-century apprentice healer Lassair learns that a nun at the abbey where her beloved sister lives has been murdered, a situation that pits Lassair against an unexpectedly dangerous threat.

"In the Bedford-Stuyvesant neighborhood of Brooklyn stands a century-old row house presided over by renegade, silver-haired Sister Evelyn. Gruff and indomitable on the surface, warm and wry underneath, Evelyn and her fellow sisters makes Mercy House a safe haven for the abused and abandoned. Women like Lucia, who arrives in the dead of night; Mei-Li, the Chinese and Russian house veteran; Desiree, a loud and proud prostitute; Esther, a Haitian immigrant...