WordPress site hacked/malware?

When I search for our site, neal-law.com, in Google or Yahoo, I'm redirected to a malicious website. I have no idea what to do next. I've Googled the issue and haven't found a solution. I was hoping you might be able to help me??

We can access the site directly in any browser, and the admin dashboard as well. It's only when we click a search results link in Google or Yahoo, possibly others, that we are redirected.

We have the Securi security plug-in installed, but upon a scan for malware, nothing was reported.

Can you help me?

Thank you so much!