Due to gang violence a younger brother gets killed and the siblings go on a rampage of crime. They work a scheme to do a home invasion robbery that is successful until a neighborhood bully tries to take their profits. Their decision for violence has unexpected and dangerous consequences that could get them in more trouble than they anticipated. 

Unanswered questions linger as Dottie’s birthday party, featuring a poker game, is disrupted by villains who ruin the evening and steal all of Dottie’s winnings, only to discover that life holds unexpected twists. The family is thrown into chaos when hidden truths emerge. A close family friend, "Lil E," brings up the past at a most inopportune moment, prompting everyone to reveal their deepest secrets and regrets. A series of events unfolds when Dottie’s niece, Toya, decides to confront those who have torn the family apart. "Trenchez 3" is a tale of revenge and betrayal, but ultimately, it emphasizes that love conquers all.

Chrissy and Toya, nieces of Dottie and cousins to Delvin and Desiree, travel from Lancaster to Los Angeles for Dottie’s 40th birthday celebration. However, they also have another reason for their visit—helping Desiree handle some unfinished business while she’s unavailable due to being in jail.Dottie, known as "Miss Lucky," plans to mark her milestone birthday in style by hosting a high-stakes poker game with friends and well-known gamblers. As the game unfolds, Dottie appears to be on a winning streak.