 Heracles was greatly impressed by Admetus's kind treatment of him as a guest, and when told of Admetus' situation, he entered Alcestis' tomb.He repaid the honor Admetus had done to him by wrestling with Thanatos until the god agreed to release Alcestis, then led her back into the mortal world.According to other accounts, Persephone, queen of the Underworld instead brought Alcestis back to the upper world.