In New York, Detective Emily Eden is a tough detective and daughter of a former cop. When her partner Nick is stabbed during an arrest of two drug dealers, Emily is assigned to a case of missing person, Yaakov Klausman, in a Hasidic community.
However she discovers that Yaakov, who worked cutting diamonds, was murdered. Emily concludes that Yaakov knew the killer and asks the rebbe permission to work undercover in the community. The rebbe brings Emily to his home and his stepdaughter Leah and his stepson Ariel help her to know people in the community and understand their habits and rules.
Emily works in a department store with Leah, Ariel and Yaakov's fiancée Mara, who was former drug addicted embraced by Yaakov and the rebbe, and her partner Levine gives support to her. Meanwhile Emily falls in unrequited love with Ariel.
When the gangsters Tony Baldessari and Chris Baldessari threaten the group to sell protection to them, Emily believes she has resolved the case. But soon she has a discussion with Ariel and she concludes that the killer is another person from the community.