When the son of a billionaire couple is kidnapped during their messy divorce, the ransom is an ultimatum: one parent will get to take their son home – the other must die.

Thanks for the feedback! What do the kidnappers get out of it? That's a major spoiler, but it is both money-related and very personal. Each parent is told separately about their 'deal' with the kidnapper - so as they try to kill each other, they both think that the other one set the whole thing up.

The title is definitely temporary, just a placeholder.

I think the logline is perfect as it stands. Great job, and great concept!

Geno Scala- judge

My only criticism would be to adjust the first half "In the midst of a messy divorce, the son of a billionaire couple is kidnapped ..." and then continue as normal. It makes the messy divorce feel less tacked on, and keeps the kidnapping and the ransom running from one into the other.
Having just read Snyder's chapter on writing a logline, I'd also like to comment that "Split" doesn't sound nearly violent or aggressive enough to match the logline. It conjures a goofy Adam Sandler comedy (unless that's what you're pitching ...). I'd suggest reconsidering the title.