It's 1957, and it's as if the world of Grantchester has returned to an idyllic state, a metaphorical Garden of Eden. Will believes that everyone can get close to their own Eden through good works and a proactive attitude. But as Geordie knows, every Eden has its snakes. Will's faith will be tested as he and Geordie are reminded that there's darkness lurking in their corner of Cambridgeshire.

The seven member Camden family expands as Annie gives birth to twins, Sam and David. But just because of newborns have arrived doesn't mean that the problems of the older children are over. A jealous Ruthie runs away from home, Mary and Lucy rebel against their household duties and Matt is obsessed with stopping the wedding of his ex-girlfriend.

Follows the Camden family, the minister father, the stay-at-home mom, and how they deal with the drama of having five children.

Reverend Eric Camden and his wife Annie are hit with troubling news when their son Simon is in a serious car accident, but after his recovery leaves home to start college. Meanwhile, Ruthie discovers the trials of having a boyfriend, all while helping Annie care for the twins. Lucy and her husband celebrate their first year anniversary. Eric and Annie become grandparents for the first time.

Newly engaged couple, Ben Murphy and Sadie Jones can't wait to be married and live their life together. The problem is that Sadie's family church, St. Augustine's, is run by Reverend Frank, who won't bless them until they pass his patented, "fool-proof" marriage-prep course. The course consists of outrageous classes, outlandish homework assignments and some outright invasion of privacy. Reverend Frank's rigorous curriculum puts Ben and Sadie's relationship...