Complex sentence: When Robert's mother passes away, he begins to reconsider things and his and Nathan's paths cross on Christmas Eve as Nathan tries to raise the money for the shoes and Robert tries to get a present for his daughter.
Split into simpler sentences: When Robert's mother passes away, he begins to reconsider things. His and Nathan's paths cross on Christmas Eve, as Nathan tries to raise the money for the shoes and Robert tries to get a present for his daughter.