I know that they stole something that they need one character to open, for blood magic reasons. (Which is going to lead to unhappy conclusions about other family members.) But they stole a number of other things, and so our characters are brightly speculate about whether they were to confuse, or the thieves really wanted them all -- or just stole whatever looked interesting, to sort out later.
They are also correctly going to deduce that the villains might not have the same purposes, but just be helping each other to get help in return. (If not that it is, actually, so.)
Going to have to get some detection spells going, soon. Ignoring or overriding adults who think it's not safe -- and are taking no steps to ensure their future safety.