열녀문(1962) / Bound by Chastity Rule ( Yeollyeomun )

A young widow in a yangban household loves a servant and bears his child in secret, then spends the rest of her life obeying a code that forbids her from ever claiming either of them, even when her grown son comes to the gate. Shin Sang-ok turns the chastity rule that bound Joseon widows into the film's real antagonist.

Why it's free: Free on the Korean Film Archive's own channel; KOFA holds the rights to the restorations it publishes.