Wrongful Demotion

When I started at my company a year and a half ago, I was hired as a Director to manage operations and relationship managers for one part of the business and the parent company had a separate Director for operations and another Director for client service. Both of them work from home full time. The company decided to integrate the two business lines and was told my position would not be impacted. At about the same time we decided to move so asked to also perform my responsibilites as a Director from home but was denied on the basis the Director needed to be onsite. I was told I could leave the company or accept a demotion and cut in pay to be effective in June. I felt I had no choice and said I would take the demotion. I was then left out of all discussions and immediately my Director responsibilities were given to the other Directors who both work from home full time in other states. Therefore, making the statement that I couldn't keep my Director position and work from home untrue. I believe this is unfair treatment and their way to push me out. I am losing around $28k in annual wages and have been treated very poorly this entire time with little to no communication. My rating for my review was meet requirements which is standard and have never been counsoled for performance. I left a VP position for a company I worked for, for 10 years for this job and I am concerned how this will look on my resume. I also never even had a formal review. I have been looking for other employment but somehow feel that I have a case for being wrongfully demoted. I am in California and am wondering if I have a valid legal complaint against my employer.