A prophecy frightens the king of Argos, and he tries to cheat fate by locking away his own daughter. But little Perseus, son of Zeus, survives the sea inside a wooden chest — and grows up to receive the most dangerous mission in Greece.

With Athena's mirrored shield and Hermes's sword, Perseus sets out to find Medusa, whose gaze turns everything to stone. Along the way: three old sisters who share a single eye, a princess chained to a cliff, and the fulfillment of an ancient prophecy.