Set against the backdrop of the Bronx, New York City in 1963, the story unfolds with Richie (Ken Wahl), the formidable leader of an Italian-American street gang known as The Wanderers. As a World War II-era Hollywood film plays on a television screen, Richie attempts to convince his girlfriend, Despie (Toni Kalem), to take their relationship to a new level, marking their first intimate encounter.

As the opening credits roll, the audience is introduced to the Baldies, a notorious gang made up of about 40 rough-and-tumble members, instantly identifiable by their shaved heads and intimidating black leather jackets. They gather ominously on a street corner under the command of their menacing leader, dubbed simply as Terror (Erland van Lidth). Nearby, Joey (John Friedrich), a spunky member of The Wanderers, passionately argues with his hesitant friend Turkey (Alan Rosenberg), who has just made the impulsive decision to shave his own head, contemplating a switch to the Baldies.

In a moment of foolish bravery, Joey insults the Baldies’ appearance, attracting the attention of Pee Wee (Linda Manz), a teenage tomboy and the only member of the Baldies’ Ladies Auxiliary. This leads to a comical yet dangerous chase where Joey and Turkey find themselves rushing through the Bronx streets as they call for help from their gang. Richie, joined by fellow Wanderer Buddy (Jim Youngs), arrives just in time but, upon spotting the approaching Baldies, they can’t help but join in on the retreat.

Cornered in a back alley, the four Wanderers brace themselves to stand their ground, but fate intervenes when a bold newcomer named Perry (Tony Ganios) emerges confidently and single-handedly takes on the imposing Baldies. To everyone’s astonishment, including his own gang, Terror ultimately backs down from confronting Perry, retreating as he shows his true colors. As Perry departs before receiving a proper thanks, Joey captures the moment, realizing that this newcomer has just altered the gang dynamics.

Later, Joey and Perry cross paths again, discovering that they are neighbors in the same apartment building. Perry, having recently transferred from New Jersey, becomes an ally as Joey explains the importance of gang affiliation for safety. Both boys dig deeper into their family struggles—Joey grappling with his abusive father, Emilio (William Andrews), while Perry copes with the emotional fallout of having a widowed mother who battles alcoholism.

Their school days become tumultuous as Mr. Sharp (Val Avery) attempts to teach his class about “brotherhood,” only for tensions to boil over during a heated argument between African American students and Italians. Richie makes an ill-considered arrangement to meet the gang Clinton ([Michael Wright]), leader of the Del Bombers, for a showdown, promising a fair fight devoid of weapons. Meanwhile, Richie reaches out to rival gangs—the violent Ducky Boys and the Chinese Wongs—hunting for allies, but his overtures are met with skepticism.

As events unfold and the Baldies keep harassing them, Turkey finds himself torn as he still holds admiration for their cruel ways. In a moment of vulnerability, the strained friendship amidst the gangs leads Richie to unwittingly accept help from local mobster Chubby Galasso ([Dolph Sweet]), who is not only the owner of a popular bowling alley but also Despie’s father. Chubby uses a display of intimidation to exhibit his authority, which leaves an indelible mark on the impressionable Richie.

Through chaos and romantic entanglements, Richie finds himself drawn to a non-Italian girl named Nina (Karen Allen), kindling a flirtation that leads to a party at Despie’s house. However, tensions flare at a subsequent gathering when the Baldies crash their celebrations, forcing confrontations and leading to unfortunate accidents, including the heartbreaking death of Turkey during an escape from the Ducky Boys.

As the story weaves through themes of loyalty, betrayal, and the weight of responsibility, the shocking news of President Kennedy’s assassination becomes a pivotal moment, allowing Richie and Despie to reconcile and face the reality of impending fatherhood. Chubby’s push for Richie to marry Despie augments the unfortunately traditional expectations amidst the turbulent gang culture.

The tension builds as the day of the highly anticipated football match between The Wanderers and the Del Bombers arrives. As the game begins, Richie tries to overcome his personal conflict and prove his worth on the field, all while chaos looms with the presence of their rivals. The ensuing brawl sees the gangs clash violently, revealing the depths of loyalty and the spiraling consequences of their violent lifestyle.

As the dust settles and relationships are tested, Joey and Perry make a life-altering decision to escape the oppressive environment for California, leaving Richie longing for a life that now seems out of reach. In the bittersweet finale, we see Richie at a bachelor party, caught between the life he knows and the life he wishes to attain. As they sing in his honor, the final shots of Joey and Perry driving toward their new beginnings highlight the enduring quest for belonging and the harsh realities of youth in a time of social upheaval.