When Valentín went to bed, he did not suspect he would embark on a wild adventure. Someone has stolen the weekend, and it must be rescued. Valentín's friend Lino, his cat Tato, and his fish Willy help him on his quest. In order to succeed, they have to sail through stars in the sky and explore amazing places until they finally make it to Makabrus Island. Here, they come across the weekend thief and must fight to get it back.