When a brain implant in his wife goes bad, a guru neurosurgeon must find a way to neutralise the implant; but when he discovers the problem is deliberate, not a glitch, he must find and destory the person tampering his wife’s mind before his wife kills herself, his daughter and others.

A "Doh!" moment. Thanks to Richiev and Paul Clarke for catching my goof.

Still, I believe the nature and purpose of the implant needs to be clarified.? What's was it supposed to do versus what does it turn out to do?? Specifically what does "go bad" mean?

A "Doh!" moment. Thanks to Richiev and Paul Clarke for catching my goof.

Still, I believe the nature and purpose of the implant needs to be clarified.? What's was it supposed to do versus what does it turn out to do?? Specifically what does "go bad" mean?

What is a brain implant?? A kidney implant is swapping out a failing kidney for another.? A heart implant is swapping out a failing heart for another?? Was her old brain swapped out for a new one?? If so,? it seems to me that the story resides in the realm of the SciFi genre more than Thriller.