When a young boy loses his sister to a brutal murder, the Somnium Drops give him a chance to get the revenge he can't get from the justice system.
"Don't even think about messing with us." 
Or something along those lines.
".لا تعبثوا معنا"
„Legt euch nicht mit uns an.“
« Ne vous opposez pas à nous »,
ça me paraît clair.
"Non mettetevi contro di noi."
"Não mexam conosco", ou coisa assim.
«С нами лучше не связываться».