A mysterious energy is detected underground. Could it be?! The power of darkness defeated ten years ago?! As Kanata and crew are stunned with shock, from the sky the legendary giant himself lands before GUTS-Select; Ultraman Trigger! Decker and Trigger, the two Giants of Light begin their fight against the power of darkness!!

A mysterious giant plant appears and the pollen it spreads lures people into a world of dreams! But it looks just like R'lyeh, the plant Kengo Manaka grew to bring smiles to the people of Mars...?!

A familiar face shows up as Kengo, Kanata, and crew try to take control of the situation, and the GUTS-Select joint extermination operations begins!

Kanata meets a young girl, Mika. She says she wants Kanata/Ultraman Decker to fight her father?!

Her father is the Space Martial Arts Champion, Grace...

Will the duel between Decker and Grace take place? And how will it end?!

A sudden sinkhole appears in the city. Analysis shows it was caused by something beyond an average monster... Kanata, Ichika, and Ryumon head down to investigate where they encounter a mysterious shadow. Suddenly, Agams shows up again! Can Kanata keep his promise to save Agams?

Kanata a.k.a. Ultraman Decker is thrown into another dimension by the extradimensional being Yapool! Just where in space has he been sent to?