Ozark season 4, episode 7 opens with a memory; Marty remembers his friend Bruce questioning his average life. He wanted to go into a partnership with his friend. Ruth thinks she will be leaving her old life behind with her cousin Wyatt in episode 7. However, Wyatt reveals he will be marrying Darlene, so Zeke does not end up in a foster home. Later in the episode, Darlene and Wyatt return home after getting married, and Javi is sat in their house. He reminds the newly married couple that he asked them to stop selling heroin, and before they can respond he shoots and kills them both.
Ruth heads to the house and hears Zeke crying frantically in the cot. She finds Wyatt and Darlene dead. Ruth drives away from the house, crying. She calls Frank Jr and accuses him of killing Darlene and Wyatt. Frank Jr tells Ruth he had nothing to do with it.
And so, Ruth heads to the Byrde family house where Jonah tells her that the person who killed them is Javi.