A logline must be compelling, it’s what sells the story to the industry.

Your logline would improve and draw the reader in if it were more specific.

There should be a specific event that compels the family to take the law into their own hands and that event should be personal.

The event should also be horrific enough that the reader will understand why it might compel an ordinary person to take the law into their own hands.

Finally, there should be stakes of some sort if the lead character fails.