Killer Darts is a 1968 Hong Kong wuxia film produced by the Shaw Brothers Studio and starring Yueh Hua and Chin Ping.
Liu Wen-lung's home is attacked by bandits led by Chou Chao.
Liu's wife was killed, but his son Yu-long was saved by a faithful servant by hiding in a well.
Liu Wen-lung adopted Yu-sien, the orphaned daughter of the victim, and raised her together with his son, settling down and giving up the pursuit of vengeance.
However, Yu-sien ran into Hu Chi-feng, who led her to believe from the dart on her mother's body that it was Liu Wen-lung who killed her family.