Siren (2004) Timeline Explained – Every Event in Order

The ritual fails because Miyako Kajiro, the young psychic girl chosen as sacrifice, resists her death and flees the ceremony. When Kyoya Suda, an outsider, stumbles into the shrine, his unexpected presence distracts the practitioners. This combination, Miyako's resistance plus the outsider's intrusion, breaks the ritual's precise requirements, causing the summoning of Datatsushi to catastrophically backfire and tear open the dimensional boundary.

Foreshadowing: Earlier scenes establish the Mana Religion's strict isolation and their desperate belief that only a perfect sacrifice can appease the deity.

• mana religion ritual
• datatsushi
• miyako kajiro
• kyoya suda
• ritual failure
• sacrifice

Shibito are the infected residents of Hanuda who suffered the disaster's effects. They display catastrophic cognitive damage, bleed from their eyes, possess extreme physical resilience often recovering from fatal wounds, and exhibit violent hostility toward uninfected humans. The infection spreads through exposure to the red water that replaces all natural water sources in town. Once infected, individuals are drawn to the Siren's call and tasked with building nests for Datatsushi's physical form.

Foreshadowing: The earthquake initially appears routine before the strange phenomena begin, signaling something far more sinister beneath the surface.

• shibito
• infection
• red water
• eye bleeding
• violent behavior
• cognitive damage

The Siren is the ominous sound associated with Datatsushi, the being the Mana Religion attempted to summon. This call serves as a summoning signal that drives all shibito to immerse themselves in the red water and recruit uninfected humans. The infected are compelled to construct nests, elaborate structures intended to house Datatsushi's corporeal form as the deity attempts to materialize in the physical world.

Foreshadowing: The eerie rhythm of the town becomes punctuated by this call, signaling the escalating presence of the supernatural threat.

• siren
• datatsushi
• call
• nest building
• shibito
• summoning

Harumi Yomoda becomes the only known human in Hanuda who remains uninfected by the red water. Through circumstances not fully detailed in the summary, she manages to navigate the distorted town and find a way back to the real world. Her escape marks the end of Day 3 and represents the sole successful departure from the nightmare, leaving other survivors still trapped in the warped reality.

Foreshadowing: Throughout the three days, Harumi persists alongside other survivors seeking routes to safety.

• harumi yomoda
• escape
• survivor
• real world
• uninfected

The red water appears as part of the dimensional rupture caused by the failed ritual. When the ritual to summon Datatsushi goes wrong, it tears open the boundary between worlds, dragging Hanuda into a distorted reality where normal physics no longer apply. All natural water sources are replaced with this red, viscous liquid, effectively turning the town into an isolated island surrounded by an endless red sea.

Foreshadowing: The earthquake triggers strange phenomena that quickly escalate beyond natural explanation.

• red water
• hanuda
• island
• dimensional rupture
• ritual failure

Datatsushi is a deity worshipped by the Mana Religion, a syncretic faith blending Christian and Shinto elements. The religion's senior members, including a nun, believed they could call forth and appease this god through ritual sacrifice. They selected Miyako Kajiro for her purported psychic gifts, thinking her death would satisfy Datatsushi and bring the town some form of divine favor or protection. The ritual ultimately sought to harness the deity's power through human sacrifice.

Foreshadowing: The Mana Religion's leaders are shown pursuing this goal despite the obvious moral cost.

• datatsushi
• mana religion
• god
• summon
• sacrifice
• psychic gifts

As the shibito continue their nest-building activities and Datatsushi's influence over Hanuda intensifies, some infected individuals undergo physical mutations. One notable change includes the development of insect-like wings. This mutation represents the next stage of transformation as the town and its infected population evolve under the deity's presence, creating creatures that are no longer fully human.

Foreshadowing: The narrative notes that the threat continues to evolve, with the infected pressing on with their mysterious objectives.

• shibito
• wings
• mutation
• insect-like
• transformation
• datatsushi

Kyoya Suda, an outsider drawn to Hanuda by online ghost stories, investigates the town's secrets and discovers the connection between Miyako's sacrifice and the resulting catastrophe. Across the three days, he confronts the source of the nightmare directly. In a final stand on Day 3, Kyoya manages to slay Datatsushi, halting the immediate threat. However, his victory comes at a cost, Hanuda remains trapped in its distorted, nightmarish state despite the deity's death.

Foreshadowing: Kyoya's investigation bridges the town's secret history with the present horror, positioning him as the key to understanding and confronting the threat.

• kyoya suda
• datatsushi
• final stand
• defeat
• slayer

The dimensional collapse is directly triggered by the failed Mana Religion ritual. When Kyoya's unintentional distraction disrupts the ceremony and Miyako flees rather than being sacrificed, the ritual's failure creates a catastrophic rupture in space and time. This tear drags Hanuda into a parallel dimension where reality becomes warped, older ruined versions of buildings reappear to replace modern structures, and time becomes distorted.

Foreshadowing: The ritual's failure is established early as the pivotal mistake that sets the entire disaster in motion.

• dimensional collapse
• hanuda
• other world
• space time distortion
• ritual
• buildings

Miyako Kajiro is a young girl selected by the Mana Religion for her supposed psychic abilities to serve as the sacrificial offering to Datatsushi. Rather than accepting her fate, she resists and escapes from the ceremony. Her resistance is crucial, the ritual requires an unwilling victim to die for the summoning to work. Her escape causes the rite to fail, directly triggering the cataclysm that engulfs Hanuda.

Foreshadowing: The religion chose her specifically because of her rare psychic gifts, making her resistance all the more significant.

• miyako kajiro
• sacrifice
• ritual
• psychic
• escape
• mana religion