Complex sentence: Batman deduces that the restorative properties of Ra's al Ghul's blood can complete the cure and tracks one of his assassins to his underground lair, leading Batman into a confrontation with Ra's daughter Talia, Batman's former lover.
Split into simpler sentences: Batman deduces that the restorative properties of Ra's al Ghul's blood can complete the cure. Batman tracks one of Ra's al Ghul's assassins to his underground lair, leading Batman into a confrontation with Ra's and his daughter Talia, Batman's former lover.