Shimada, a former Self-Defense Force member, suffers from severe PTSD following the loss of a comrade in a firefight in war-torn South Sudan, a tragedy covered up by the government. Shining a light into Shimada's solitary life in illegal arms manufacturing is a job as an apprentice at a traditional Japanese fireworks factory. There he begins crafting fireworks alongside the master artisan and fellow craftsmen who embrace fireworks that illuminate people's peaceful lives. Yet, parallel to Shimada's journey, his comrades-in-arms with unresolved feelings team up on radical acts to expose the government's cover-up, escalating tensions and pulling Shimada back into the darkness he thought he'd left behind.
Ten years have passed since the defeat of the Zangyack Empire, and the Gokaigers have seemingly disbanded and gone their separate ways. On Earth, “Super Sentai Derby Colosseum” has become the hottest gambling venue ever, with various Super Sentai battling each other for charitable causes. Suddenly, Captain Marvelous appears, issuing a challenge to the Colosseum’s administration and those who work for them... including Gai Ikari! Is it the Gokaigers or the people of Earth who have changed in the past ten years? And what of Joe, Luka, Doc, and Ahim? After ten years, an extraordinary battle is about to begin…