Complex sentence: As punishment, his shamed father has the doorway to his hiding place bricked up and curses his son to find no rest until one of his descendants redeems him with an act of bravery.
Split into simpler sentences: As punishment, his shamed father has the doorway into his hiding place bricked up. His ghost is doomed to haunt the place until one of his descendants redeems him with an act of bravery.