Yoo Ah-in genuinely bashed his head against the flagstones of the palace courtyard; the blood was his own.
Based on true historic event called 'Im-o-hwa-byeon' in 1762, which King Yeongjo decreeing Crown prince to climb into and be sealed within a large wooden rice chest. Crown prince died eight days later.
It was also selected as the South Korean entry for the Best Foreign Language Film at the 88th Academy Awards but it was not nominated.
Grand Queen Dowager Inwon was King Yeongjo's adopted mother(Choi Sukbin is his mother), the previous King Gyeongjeong's Queen Dowager Seonui died six years after the death of her king, making the GDQ Inwon controls the influence and authority over the palace