In celebration of the 30th anniversary of the beloved Kaiketsu Zorori children's book series, a special film unfolds. Zorori, aiming for tasty donuts, invents an alarm clock contraption but is caught in a poignant moment of recollection about his mother, leading to a mysterious occurrence. Suddenly, amidst fleeting memories, the emblematic ZZ symbol vanishes from Zorori's outfit, a cherished mark bestowed by his mother though its significance eludes him. Following an unexpected crash landing, Zorori, accompanied by Ishishi and Noshishi, encounters a helpful fashion student whom they soon learn is none other than Zororene, Zorori's long-lost mother. What was initially an alarm clock transforms into a time machine, propelling them back to the past. Joined by Zorondo Ron, Zorori's father, the group embarks on a daring mission to retrieve their time-travel device from the clutches of both law enforcement and a colossal kaijuu.