Mannix is hired by a secretive multi-millionaire to find his ex-wife. At least that's what he has been told when he takes the job. The ex-wife, a prominent singer, supposedly committed suicide but has been seen since her supposed death. As Mannix pursues the trail, it becomes clear he hasn't been given the entire story. The lives of Mannix and the ex-wife may soon come to an end unless the detective solves the mystery.
—Bill Koenig