Fifth-grader Duck Smith is obsessed with the mysteries of history, and his best friend Sera Frost cannot live a day without physics problems. Therefore, when one day they find out that they live in a world full of historical mistakes and rapidly approaching disaster, they understand that they must act. Especially now that they have a real time machine in their hands called the Infinity Ring. With his help, Duck, Sera and their new comrade Rick return to the past on the ship "Santa Maria" of Christopher Columbus to try to correct the first mistake of history, and at the same time find Duck's parents, lost in the labyrinths of the past.