When actress Celia Cross finds a body washed ashore on the Malibu beach, her first impulse is to dial 911. When the badly wounded man turns out to be alive, she heeds his plea not to call the police and takes him back to her house. Undercover government investigator Roy Starr was checking out a yacht owned by suspected terrorists when he was discovered, shot and thrown overboard. Before long, Celia is posing as his Undercover Mistress (3). Kathleen Creighton's story of intrigue and emotional growth has exciting moments as well as sexual heat. But the unlikely plot and insufficient motivation for the heroine's actions weaken it.