Season 1 of Kembara Bermusim follows Aisyah, a young Indonesian woman who travels to Malaysia in search of her father, who abandoned his wife and children 15 years earlier to escape poverty. Upon arriving, she discovers that he has become a successful CEO and established a new family. However, her unexpected arrival creates tension and resentment within his household, particularly from her half-sister, who is unaware of Aisyah's true identity. Across 30 episodes, the series explores family secrets, jealousy, abandonment, identity, and the emotional struggle for acceptance and reconciliation.