In the north of medieval Portugal, the beautiful Ana falls in love with Thomas, a poor artisan. Her father immediately forbids their union, demanding that his daughter's suitors produce a jewel as proof of their nobility. But the young couple refuse to give up. With the help of their faithful companions, the generosity of the townswomen and the talent of a mysterious jewellery maker, Ana and Thomas will face many challenges out of love, including the powerful and evil Duke of Aragon.