Mjolnir, the powerful Uru hammer that Thor has wielded in battle for centuries, has gone missing! And nobody, not even the all-seeing Lady Sif, is able to locate it. So Thor must turn to the last person he wants help from: Odin. For until the hammer is found, nobody is safe! Because it turns out that Mjolnir is on a rampage across the Ten Realms--leaving only death and destruction in its path! The fatal prophecy of the God of Hammers is about to be unleashed, and Thor must act fast to save his kingdom!