On his birth, Hephaestus was rejected by his mother Hera because he was lame. When Hephaestus learned about this, he got very angry and promised to take revenge on her. So he decided to create a magic, golden throne and send it to Mount Olympus as a special "gift" to his mother.
When Hera saw the splendid throne, she immediately got enthused over it and, without thinking, she sat on the throne cheerfully. All at once, invisible, unbreakable chains appeared and tied her up rapidly. Hera cried for help and all Olympian gods ran for support, but none of them was capable of relieving her! Soon all gods realized that the only one who could liberate Hera was Hephaestus himself.
So the gods asked from Dionysus, the god of wine, to offer sweet wine to Hephaestus in order to intoxicate him. Dionysus agreed, and this way he managed to bring Hephaestus up to Mount Olympus and free Hera from her burdens.
The gods thanked Hephaestus by giving him Aphrodite, the goddess of love, as his wife and created a marvellous palace for him on Mount Olympus.