In 1930s Marseille, the charismatic and ambitious gangster Roch Siffredi has recently been released from prison and sets his sights on reclaiming his status in the city's underworld. He soon crosses paths with another emerging criminal, François Capella, who is just as charming and driven. Initially rivals, the two men find themselves vying for the affections of the same woman, Lola. However, recognizing each other's skills and potential, Roch and François form a partnership, setting out to carve a path to dominance through the bustling streets and smoky establishments of the port city. Their unlikely alliance begins with a series of daring heists and clever schemes that establish their prominence among the local gangs.

As Roch and François expand their operations, they encounter various challenges and rivalries from established crime bosses who see the newcomers as threats to their empires. The partners' shared ambition and cunning allow them to navigate through these dangers; however, their increasing notoriety attracts the attention of both law enforcement and the city's competing criminals. The duo's rise to power brings both opportunity and danger as they try to solidify their control over Marseille’s criminal activities. Tensions simmer beneath the surface as their partnership faces external pressures and personal betrayals that threaten to unravel their carefully constructed empire. With each success, they edge closer to a confrontation that will test their bond and alter the landscape of the underworld they have come to dominate.