what's reality?

My wife went on a normal 'One-week camping trip' with her four friends in the forest. Until, it wasn't normal anymore. Everyone from the trip disappeared without any trace. A month later, dead bodies were found in the lake nearby. And my wife's location and situation were a complete mystery to me. There were no developments on the case aside from the sightings of the dead bodies. And my paranoia was blurring the line between my imagination and reality. So, I decided to take matters into my hands. I'll not rest until I find her. Alive!