Complex sentence: Months later, the protagonist escorts Medea to Argonia for her arranged marriage to the prince of Argonia, but before the ceremony can take place, the protagonist and Medea escape from Argonia and live happily together.
Split into simpler sentences: Months later, the protagonist escorts Medea to Argonia for her arranged marriage to the prince of Argonia. However, before the ceremony can take place, the protagonist and Medea escape from Argonia and live happily together.