Complex sentence: The priest is sent on a mission by the Pope to find and protect the girl from Satan at all costs; however, a few Vatican Knights (led by a corrupt cardinal) insist that she must be killed to prevent Satan's plans.
Split into simpler sentences: The priest is sent on a mission by the Pope to find and protect the girl from Satan at all costs. However, a few Vatican Knights (led by a corrupted cardinal) insist that she must be killed to prevent Satan's plans.