As Jessie, a free-spirited florist, experienced a dramatic plunge towards the earth after being left at the altar during a parachute jump, her descent takes an unexpected twist. In a bizarre turn of events, she inadvertently drops her ex-boyfriend into a tranquil lake, right in the middle of a whimsical wedding celebration that is already in full swing. The chaos that unfolds from her parachute fiasco leads to a series of misadventures that would leave an indelible impression on her life. Her sudden arrival at the wedding, heralded by the sound of ripcords and flapping fabric, earns her the infamous reputation of being "the wedding trasher" as onlookers watch in bewilderment.
This newfound notoriety catches the eye of Liz, Maggie Grace, a sharp and visionary modern bride who is navigating a high-stakes political campaign with her fiancé, Robert. Recognizing a spark of spontaneity in Jessie beyond the tumult she has stirred, Liz extends an unusual invitation to her—tasking Jessie with infusing the wedding reception with the kind of liveliness that could overshadow the sanitized atmosphere of Robert's mayoral campaign.
As Jessie delves into the world of wedding planning, she clashes with Lawrence Phillips, played by Jeremy Irons, a meticulous perfectionist who values order and has a severe aversion to disorder since the tragic passing of his wife. The meeting of these two polar opposites leads to tension as Lawrence, whose sense of humor has dimmed, finds himself in a journey of rediscovery, spurred on by the presence of Sarah, a blind woman who brings a unique perspective and warmth to those around her.
Meanwhile, the stakes rise with Robert's brother Jimmy, a gambler caught in a precarious situation, drowning in debt. In a desperate bid for redemption, he participates in a reality TV show called Crash Couples, hoping to turn his luck around. As he finds unexpected chemistry with Olga, a stunning stripper entangled with the criminal underworld, Robert faces the repercussions of his brother's risky decisions and his own commitment to family.
In the backdrop of these intertwined lives, Robert's chief of staff attempts to impose a sense of decorum on the wedding festivities, wishing to enhance Robert's reputation as a man of the people. However, unexpected elements, like the arrival of Ritchie, Andrew Bachelor, add surprises that could alter the celebration's course.
Amidst all this, the musical collaboration between high school friends Mack, played by Diego Boneta, and Lenny, Jesse McCartney, takes a rocky turn as Lenny's romantic dealings with Yoni complicate their friendship. Jessie, driven by ambition, seeks to have them perform at Liz and Robert's wedding, securing their commitment through a fierce arm-wrestling match with Mack. As tensions rise, Lenny's invitation to Yoni creates ripples within their friendly bond.
Behind the scenes, Jessie orchestrates her own plans by rallying street musicians to fill the gaps left by Mack and Lenny's fallout. As their friendship strains, Jessie grows closer to Mack but is initially hesitant to embrace his romantic overtures.
In a charming subplot, Captain Ritchie discovers his unique blend of humor when he appears on television, sparking a quirky quest to find a mysterious woman with a glass slipper tattoo on her neck, a quest that adds an additional layer of charm to the narrative.
Through these diverse tales, the two buskers across the street beautifully harmonize their musical talents, offering a poignant counterpoint to the unfolding drama. As the characters’ journeys converge, the film culminates in a heartwarming celebration that highlights the timeless themes of friendship, love, and the unifying power of music.
