Complex sentence: Susan Jacks (Sinatra) is an IRS agent assigned to keep tabs on Steve and apply his future prize money toward his $150,000 debt, but she ends up taking a romantic interest in him.
Split into simpler sentences: Susan Jacks (Sinatra) is an IRS agent assigned to keep tabs on Steve and apply his future prize money toward his $150,000 debt. But she ends up taking a romantic interest in him.