Complex sentence: The story begins with Alberich arriving back in his kingdom to discover that he has very little left, nothing in the kingdom works, and his worker dwarves have formed a union and gone on strike.
Split into simpler sentences: The story begins with Alberich arriving back in his kingdom. All is not well-he discovers that he has very little left, nothing in the kingdom works, and his worker dwarves have formed a union and have gone on strike.