Satellite technicians enter the woods to repair a communication station, but then they encounter the crew of a crashed airplane. However, something inside the lake is taking over everyone's minds, loosening their inhibitions. However, one of their number is about to bond with the entities and be reborn in a new body.
There's a fair amount of body horror on display, with one character melting into a giant pile of guts and blood. But there's also more than a fair amount sheer nonsense. And not in a good way. In a way that makes this film seem like it's ten times longer than its actual running time.
There is a pretty cool synth soundtrack, though. So it has that going for it. I've just seen too many movies lately where people are lost in the woods and screaming one another's names for twenty minutes in a row, maybe.