Most likely a Serbian or Bulgarian film or animated feature about Saint Petka (Paraskeva of the Balkans) , a popular Orthodox saint. "Cross in the Desert" suggests a spiritual or historical drama set in the Judean or Egyptian desert (where early Christian ascetics lived). It may be a lesser-known religious film from the 2000s or 2010s.
Sveta Petka, or St. Petka, is a figure of great reverence in Orthodox Christian tradition. Her story is one of devotion, sacrifice, and the unwavering commitment to spiritual purity. According to legend, Sveta Petka lived a life of asceticism in the desert, dedicating herself to prayer, fasting, and serving God. Her spiritual journey was marked by profound miracles and encounters with the divine, inspiring countless pilgrims and believers.