Massacres and mysterious disappearings are occuring in the Kabyle mountain regions of Algeria by a dangerous beast. A professional hunter is engaged by authorities to track down the creature and eliminate it, he will soon realize the task won’t be as simple as his previous achievements.

I think your log line would sound better as follows -

When an expert hunter discovers a ferocious beast, he risks his reputation if he doesn’t pursue and capture it to save a village at the expense of endangering his team mates.

What do you think?

“he’s” Not the protagonist. Best in a logline to state the protagonist upfront.

Best to start...”When (protagonist). Say what happens/occurs...then what they must do or not do and why...and what will be the result if or if the goal isn’t met.

Richiev's version is an improvement.