Peter, a struggling screenwriter, finds himself in the midst of a messy divorce with his estranged wife, Maria. As if dealing with the emotional turmoil of the separation wasn't enough, Peter is also burdened by his father's deteriorating health. In an attempt to temporarily escape the chaos and find solace, Peter decides to embark on a spontaneous trip to Tulum, Mexico, with a select group of close friends. Little does he know that this trip will be anything but relaxing.

Peter gathers his comrades, including his loyal best friend Mark, his witty and vivacious sister Emily, and his charismatic colleague Alex. Together, they set off on a journey filled with unexpected twists and turns. Upon arriving at the picturesque beach town of Tulum, Peter's intentions of having a surprise bachelor party for himself unfold. As the group indulges in the vibrant nightlife and exotic beauty of the location, tensions rise and secrets are revealed.

Amidst the celebration, Peter's unresolved emotions towards Maria resurface, and he finds himself questioning the decisions she has made. The group becomes entangled in a web of complicated relationships, as each member grapples with their own personal demons. As the days pass by, Peter's father's health takes a turn for the worse, forcing him to confront his responsibilities and face the reality of his crumbling family.

The once carefree bachelor party transforms into a journey of self-discovery, forgiveness, and acceptance. In the end, Peter realizes that the key to finding happiness and closure lies not in escaping from his problems, but in confronting them head-on. With newfound clarity, he returns home to confront Maria and seek a resolution to their divorce. Along the way, he learns the importance of cherishing the people who truly matter and the power of forgiveness in finding peace.

"Before the Ex-Husband" is a heartfelt and poignant drama that explores the complexities of love, loss, and the pursuit of personal growth in the face of adversity.