Borhan's anticipation to meet his daughter after years of separation is complicated by a past that resurfaces. Tupur grapples with the aftermath of loss, the complexities of her relationships, and the reappearance of Raihan, an old friend whose presence stirs up unresolved emotions. Meanwhile, Sheila finds herself entangled in a journey of self-discovery and emotional awakening.

Kousik Zaman's "Lost in Horizon" weaves a tapestry of interconnected lives, exploring the depths of human emotion, the enduring power of hope, and the way the past shapes our present.