Minna lives with her father, John, in a cozy house until her life is disrupted by the arrival of her new stepsister, Jenny. Unbeknownst to others, Minna discovers a hidden world where "dreambuilders" construct dreams. As she grapples with Jenny’s presence and disruptive behavior, she ventures into the dream world and discovers she can manipulate Jenny's dreams, hoping to mend their strained relationship. Minna learns that altering dreams has unexpected consequences, as changing one thing in a dream leads to unforeseen reactions in reality.

As Minna delves deeper into the dream world, she struggles with the moral implications of her actions. The boundary between dreams and reality starts to blur, putting both sisters in danger. Minna realizes that, to restore balance back home and in the dream world, she must find a solution that respects both her and Jenny's needs. Seeking understanding and friendship rather than control, Minna embarks on a quest for reconciliation amidst imaginative landscapes crafted by the dreambuilders. Her journey highlights the power of empathy, communication, and personal growth amid the extraordinary dream scenes that shape both their lives.