King Aegeus of Athens was travelling in Troezen when he met the daughter of the king of Troezen, Aethra. He fell in love with her, and she fell pregnant. He went to a cave and put some sandals and a sword inside, then blocked the entrance with a marble boulder.
If the child is a boy, when he grows old enough to move this boulder, send him to athens.
Theseus soon moved the boulder, and his grandfather organised him to sail to Athens. He decided instead to walk, the much harder route, and defeat the robbers plaguing that road. The people loved him because of this. He successfully arrived in Athens, and his father joyfully welcomed him.
meanwhile in Crete, Poseidon, Greek god of the sea, gave king Minos a bull to sacrifice to him.
I rather like this bull. I think i'll keep it.
you dare defy me! you will pay
Poseidon got his revenge by making Pasipae, Minos' wife, fall in love with the bull.
my darling, you look so pretty today
The result was a grotesque, flesh hungry half man half bull. To keep the rest of the world safe from him, King Minos imprisoned him in a labyrinth deep underground.
The son of King Minos died while visiting Athens, so in his anger, King Minos declared that 14 young adults from Athens must be sacrificed to the Minotaur every year.