Set was jealous of his brother Osiris so he decided to take care of him. Since gods cannot die, he decided to imprison him. He decided to choose a golden, jewel plated coffin. As a gift, but, being to gullible god he is he decided it was quite a wonderful gift. So he decided to lay in the coffin. But then a golden lid materialized on top of it. Then he was hidden. Then Isis, his wife searched for him and eventually found him. But Set did not like that so he shattered his brother into twelve peaces and hid the around Egypt. But eventually Isis found all peaces and had help from Horus.