Douse any one have an opnion on the story Orpheus in greek motholgy do you think it is happy or sad and why?

I do not understand this story and i need some help for homework. remember i need to right this down so use words in a 7th graders vocabulary. The homework is to decide weather you think th ending is happy or sad and why. when i asked my teacher for help she would not help me! PLEASE HELP!