While I am away from my house, I am planning to remote into my computer. In the case if there is a power outage, is there a way to turn my computer back on remotely?

I am not sure if there a hardware card that can accept WIFI commands or is this a BIOS setup thing? I was thinking of connecting it to a SMART-Plug but even if I power the SMART-Plug on, still needs someone to manually turn n the PC.