Thor: Son of Asgard #11
an issue of Thor: Son of Asgard by Marvel Comics
Issue description
"WORTHY" PART 2 (OF 3)
When Sif is kidnapped by Frost Giants, Odin instructs Thor to stay and guard the palace. But given his feelings for Sif, Thor would travel to the gates of Hel itself to save her... and he just may have to!