Bad engine miss

One wet plug, would indicate no spark, - bad plug, - wire burned/arcing, or something in cap.
Plug being wet also indicates intake valve is opening, - no backfiring outta the carb, as happens when an exhaust valve isn't opening, would presume exhaust valve is opening.
I'd be looking at exchanging/replacing the plug to a cylinder that's firing.
Check/change plug lead, scrutinize cap and rotor.
jmo