"Yume o Kanaeru Zō" centers on a young protagonist named Haruto, who discovers a mysterious, sentient elephant-shaped artifact known as the Dream Elephant. This artifact possesses the ability to grant wishes, but only under specific conditions. Haruto, a reserved and introspective high school student, stumbles upon the Dream Elephant during a visit to an antique shop. The artifact reveals that it can fulfill one wish per person, but the wish must align with the individual's true desires and come from a place of genuine intent. However, the process of granting wishes is not straightforward, as it often involves confronting personal fears, unresolved emotions, and hidden truths.

The narrative unfolds as Haruto begins to interact with classmates and acquaintances who also seek the Dream Elephant's power. Each character's wish reflects their innermost struggles: a talented artist grappling with self-doubt, a star athlete burdened by familial expectations, and a lonely girl yearning for connection. As the Dream Elephant grants their wishes, it reveals the complexities and consequences of their desires, often leading to unexpected outcomes. The artifact serves as a catalyst for self-discovery, forcing each character to confront their insecurities and reevaluate their priorities.

Haruto's own journey becomes intertwined with the Dream Elephant's enigmatic origins. Through a series of flashbacks and cryptic visions, it is revealed that the artifact was created by an ancient civilization as a tool for enlightenment, designed to guide individuals toward understanding their true selves. However, its power was misused in the past, leading to catastrophic consequences. Haruto must navigate this legacy while grappling with his own wish, which remains shrouded in ambiguity until the final episodes.

The series explores themes of identity, ambition, and the human condition, using the Dream Elephant as a narrative device to delve into the psychological and emotional landscapes of its characters. The pacing is deliberate, allowing for gradual character development and the exploration of moral dilemmas. The interplay between the fantastical elements of the Dream Elephant and the grounded, relatable struggles of the characters creates a compelling balance between the surreal and the mundane. The story concludes with Haruto making a pivotal decision about his wish, ultimately resolving the central conflict while leaving room for contemplation about the nature of dreams and desires.