Hercules wakes up from the spell put on him by Hera and realizes he killed his wife and three children.
Hercules thinks his life has no meaning, and he wants to kill himself, however, Theseus talked him out of it. He was then brought to Eurysthesus who would ask anything of him and Hercules would have to do it.
One task he was given was killing Hydra which was a seven-headed monster.
The next task was for Hercules to bring golden apples of the Hesperides, however, he did not know where the apples were. He then asked Atlas for help and got tricked into holding the earth for a short time, before he tricked Atlas.
His final task was to bring Cerberus from the underworld to the surface. This was the most difficult task because he was only allowed to use his hands and no weapons.