The good stuff
Though it centers on a shocking murder, the movie takes great pains to juxtapose the violence with love and domesticity. Loss, though destabilizing, is portrayed as far from decimating. Death isn’t explored as an end but a passage.
Yes, there’s a murderer/pedophile involved, but besides him, the movie's characters are decent and earnest -- as well as realistically imperfect. Though the mother reacts in a surprising way to her daughter’s death, her love for her child comes through; the father is more textbook caring. And the younger sister is impressive in her courage and determination.
What to watch out for
Brief flashes of a man grabbing and throwing a teenager to the floor and against the wall (though her actual death takes place off screen). He’s also shown carrying a bloody bag and soaking in a tub, his blood-stained clothing strewn on the floor. The sink is filled with bloodied water. A safe that presumably holds a corpse is repeatedly shown. The bodies of a serial killer's victims are shown in the various places where they were dumped. A teenager beats up a man with a baseball bat; the man is later shown bruised and battered.
Some kissing. Implied pedophilia.
One "f--k," plus occasional use of words like "h--l" and "oh God" (as an exclamation). Also some name-calling, including “jerk off,” “moron,” and “stupid.”
Some labels and signage are visible (Kodak, Seventeen magazine).
Drinking, drugs, & smoking:
A grandmother chain-smokes and drinks heavily in front of her grandchildren.