Alcmene, Iphicles, Jason, Falafel and Iolaus only wanted to throw Hercules a birthday party. Instead they got poisoned by the treacherous Callisto, who was on a mission from Hera to kill Hercules. To save them, Hercules agreed to travel with Callisto to the Labyrinth of the Gods, where the Tree of Life offered a cure. When they arrived, Callisto momentarily trapped Hercules and ate from the Tree, rendering her immortal. But Hercules engaged her in a fierce battle, incapacitated her, and returned home to cure his family and friends with fruit from the Tree.