Struggling to find inspiration, Lucius Modestus, an architect from ancient Rome, faces a job search. Amid his despondency, his friends usher him to a busy bathhouse in an attempt to lift his spirits. Overwhelmed by the commotion, Lucius unexpectedly stumbles upon a hidden passage underwater leading him to a modern Japanese bathhouse. This serendipitous discovery sparks his creativity, offering a glimpse into futuristic designs. Armed with this newfound insight, Lucius endeavors to replicate these innovations despite limitations, hoping to rekindle his prestige. Will his inventive prowess be sufficient to capture the admiration of the people and restore his architectural acclaim?