 On the set of a popular daytime soap opera  Mile High , actress Kris Buckner is being forced off by co-star Mark Stratton. When she says that she ll  kill him before she leaves the show , she makes herself the prime suspect when Stratton is murdered by someone poisoning him. As an old friend, Perry Mason comes to the help of Kris and agrees to defend her. Meanwhile Ken goes in search of information with the help of fan of the show.