Two young friends who are prominent in the online deaf community pursue a shared dream in the northern California wilderness; when the pact turns sour and one of them goes missing, detectives must make sense of their perilous and deadly journey.

When first responders find a self-made millionaire dead in his lakeside mansion, initial signs point to a natural cause of death; as investigators probe further, they uncover a toxicological bombshell that blows the case wide open.