The agency is hired by Eve Perkins, who wants them to investigate the death of her aunt, famous stage actress Eve Le Deux. She died when electrocuted in the hot tub at Springtime, an upscale women's only spa. The death was rule accidental in that the facility's wiring was deemed old and potentially faulty, but Eve believes she was murdered. Adding to the suspicion is that the last person arguably to see her alive, a young therapist at the spa named Amy O'Toole, suddenly vanished after that day. As Springtime is a women's only facility, Bosley will look for Amy while the Angels go undercover inside, Kelly as a guest, Sabrina as a dietitian and Kris as a fitness instructor. Their three primary suspects are: Ingrid Nyberg, the facility's managing director who is up front to Sabrina and Kris that she is the only employee who knows who they are but does not want them there; Dr. Slavin, the facility physician who advocates hypnotherapy; and Zora Stafford, the hulking physical therapist who threatens Kris upon first meeting. The Angels quickly begin to believe that Eve's death had either to do with blackmail, as they discover the facility is filled with means to clandestinely gather private information, and/or Eve's memoirs which she was known to be writing but which no one including her publisher has seen. One person who may know something is fellow guest Norma Powers, a long time friend of Eve's and fellow actress who uses her acting training to be observant of everything that goes on at Springtime. What makes this case more difficult for the Angels is that the facility is like a fortress, with few ways for unwanted people to get in, and equally few ways for anyone to get out that a murderer inside would want to kill.
—Huggo