Dr. Maura Isles is asked to observe a CT scan on a mummy that's been found at Boston's Crispin Museum. When the relic turns out to be fake, Detective Jane Rizzoli is brought in on the case. Who would cover a dead body in ancient wrappings? The answer lies with the mysterious Egyptologist Josephine Pulcillo. Josephine has a past that she would like to remain secret. But after someone else is found murdered, Jane and her partner, Detective Barry Frost, delve into the Crispin Museum's doings and Josephine's private life. The killer seems to have a love for performing creepy rituals after death, including making a tsantsa (a shrunken head). Can Jane uncover his identity before he turns another women into a trophy? The Keepsake is another fast-paced ride with Gerritsen's series characters of Isles and Rizzoli.