Plymouth Undercover by Pamela M. Kelley

A mother and daughter inherit a PI Agency with a reputation that takes them by surprise.

Meet Emma McCarthy, a thirty-year-old failed actress that just moved home to Plymouth, MA.
And her mother, Cindy, a yoga instructor in the Pinehills, an exclusive golf community in Plymouth.
They’ve just inherited Court Street Investigations, a private detective agency.
And its one part-time employee, eighty-year-old Mickey, a retired police detective.

They expect typical cases like cheating spouses or workman’s comp, but quickly learn that the agency also has a reputation for solving murders when they are hired to find a local missing woman.