When a troubled teenage mother finds her abandoned newborn is cared for by occultist foster parents, she has 72 hours to save him before he is sacrificed to Devil.

As Richiev has amended in his version, the inciting incident is the moment she knows her baby is in danger. That's the event that ties up with the goal of saving her child.

How does she find this out by the way? Not saying it's not possible obviously, I just want to check that it's plausible. Is there a wider conspiracy involving the people who determine the foster parents of these kids? Or are these foster parents just really good at hiding who they really are?

Interesting idea!