In the premiere episode, LAPD Detective Sam Hodiak and undercover officer Brian Shafe begin the search for a missing teenage girl, Emma Karn, who has fallen under the spell of infamous cult leader Charles Manson

Drug dealer Art Gladner is found murdered, and the chief suspect is Shafe's snitch, Mike Vickery. Hodiak agrees to help Shafe exonerate Vickery. In exchange, Shafe takes rookie Charmain Tully undercover into the Manson Family to find out where Manson has Emma. They succeed, but not without consequences, especially for Charmain. Michaela McManus,