The Stairway To Heaven hitmaker claims Alysson Billings has been harassing him for over three years and believes that they are in a relationship, despite Plant insisting the pair has never met.
In legal documents obtained by editors at Tmz.com, the rocker alleges that Billings constantly sends him flowers, random packages, leaves hotel keys for him and has repeatedly appeared at his concerts all over the world.
However, Billings' obsession has taken a dark turn since he started a relationship with current girlfriend Patty Griffin, reportedly sending him threatening messages such as, "Your betrayal with another woman still stabs my mind," and, "This woman is literally evil for you and your life... you are about to fall for that dirty old crotch. And I'm not joking, I cannot, will not, shall not live this way anymore."
Plant even hired security assessment experts who supported his assertion that Billings is a threat to his safety.