Judex the vigilante enjoins crooked banker Maurice-Ernest Favraux to distribute his ill-gotten fortune to the city's poor. The thugs decide to kidnap the financier's daughter.

A continuation of the film series "Judex" the masked fighter for justice.

Prologue: Morales and Monti plot to inherit the fortune of Favreaux the banker; Rochefontaine plans to marry the banker's daughter Jacqueline so that he can pay off his debts; Kerjean, recently released from prison, requests Favreaux's help in finding his son; Judex warns Favreaux to repent for his crimes before he is punished; Favreaux hires the private investigator Cocantin to protect him from Judex. Episode 1: Devastated by the realization that her father was corrupt, Jacqueline bequeaths her father's fortune to charity, leaves her son in the care of friends, and moves to Neuilly to look for work; Judex and his brother continue to carry out their plan in their secret lair; Cesar plots a way to make Jacqueline fall in love with him.

讲述了一个童话般的故事，邪恶而贪婪的银行家收到名为“犹德士”的复仇者的来信，如果他再不改邪归正，第二天的午夜十二点他将得到死亡的惩罚。预言果然应验（犹德士以带着巨大鸟头的魔术师形象现身，像死神一样翩翩而至），银行家暴毙在舞会上留下了他无助的女儿。女儿散尽家产为父亲赎罪，没想到因此使犹德士宽恕了父亲的罪行。 乔治·弗朗叙作为1936年成立的法国电影资料馆创立者之一，将他的毕生精力投入到电影资料收集保护的工作中。可以说《犹德士》就是一部向电影之父路易·费雅德致敬的影片，后者在1916年导演了第一版《犹德士》。在借鉴费雅德版本的基础上，弗朗叙既保留了原作探险的故事情节，又加入了自由的基调。影片自始至终充满了讽刺的意味。

When an unscrupulous banker ruins his family, a young man swears to bring him to justice, so he adopts a new identity, the mysterious Judex, and ominously disguised and sunk into the muddy path of vengeance, punishes the crooks and protects the innocents. (Originally a twelve-part epic serial.)

Judex在影片中的意思并不是法庭中的陪审员，所示翻译成陪审员则会造成“别的陪审员在哪里呢”的疑惑，而影片中只有Judex一人在扮演审判者的角色。而Judex最恰当的翻译应该是审判者，或者译作审判员也会比陪审员要好得多。