When an black high school football star mysteriously disappears, his four friends and their dog set out to find him, discovering that things are much more sinister than they seem.

>>>>?discovering that things are much more sinister than they seem

It goes without saying that the protagonist always starts out on his struggle underestimating the risks involved, the jeopardy, the psychological and physical price he will eventually discover he has to pay to succeed.? That's part of the essential nature of drama, most particularly stories? belong to the action, thriller, adventure genres.

So it isn't necessary to say what goes without saying.

The first half of this logline isn't bad, (Although I would drop the line about the dog) however I would listen to CraigD on the back half and be a little more specific.