Four female friends have worked together for forty years for an organization known as the Museum. Most people have no idea this organization even exists. It was formed just after WWII and its original objective was to locate Nazis and kill them. Then they branched out and started killing other bad people who they felt needed killing. That's what these four female friends did...they killed people. But now, they're sixty-some years old and the Museum felt they should retire, so they've sent the ladies on a lavish retirement cruise. However, these ladies still have a lot on the ball and they soon realize they were sent on this cruise so that they could be elimated. Now the tables have turned as the four friends go after the people who were coming after them. This book is full of action, camaraderie, humor and female empowerment. It's an entertaining read. Especially if you're a reader of a certain age.