Episode 7 of "Motorheads" kicks off with Cate tirelessly toiling away on the UNB10 alongside the boys, well into the wee hours of the night. Logan eventually intervenes, insisting they call it a day as school loomed the following morning. Unable to rest, Cate persists in her endeavor, eventually succumbing to exhaustion and drifting off in the car. Meanwhile, Zac sneaks out under the cover of darkness and triumphs in his maiden race. Amidst the celebration, Ray inquires about his emotions, to which Zac expresses a yearning for his crew's presence. Ray gently reminds him that, for now, he is his sole teammate, and in return, retrieves a car that Zac owed him.
As dawn breaks, Logan rouses Cate from her slumber in the vehicle. Haunted by the absence of her father, Cate rebuilds the car with the hope that, should he ever return, she would be the one to hand it over. She confides in thoughts of countless scenarios involving him, but foremost among them is whether he knows what she looks like now.
Cate arrives late at school, only to find her auto shop teacher eagerly awaiting her, poised to commence a video session. Her spirits lift at the prospect of a shipment of parts arriving later that day. However, her excitement dampens when Curtis reveals he has prior commitments with Brooke and won't be able to join her. Cate is disheartened, having expected Curtis to share her enthusiasm.
At the garage, Marcel grapples with keeping Zac's racing escapades with Ray under wraps. But secrets are short-lived. While en route to pick up parts for Marcel's car, Zac's patience snaps, confronting Logan for his refusal to teach him how to drive. He feels marginalized, believing Logan prioritizes Cate and Marcel over him. Elsewhere, Curtis reconsiders and cancels his date with Brooke, opting instead to lend a hand at the garage. Cate wrestles with a faulty horn button, and Curtis comes to her rescue with a helpful YouTube tutorial.
Harris finds it excruciatingly difficult to come to terms with his father's decision to liquidate all their real estate holdings, the pain amplified when he witnesses the family's esteemed name being erased from public view. Despite his father organizing a heartfelt birthday tribute to their late mother, Harris opts out, choosing instead to dine with Ryan, seeking solace in his friend's company. In a fit of rebellious spirit, Harris dares Mateo to a race and subsequently returns the key to the Porsche to his father, a symbolic gesture signifying his independence from financial reliance. With Ryan by his side, Harris speeds off, ignoring Alicia's presence.
Elsewhere, Logan seeks insight into racing from Zac, prompting the latter to recount his maiden race, likening it to an exhilarating dance. Zac's curiosity leads Logan to share a memory of his father, Christian, racing with a newfound determination. Post-victory, Christian's eyes seemed to undergo a transformation, as if he had discovered his true calling. Logan reveals that he too felt that same clarity. Zac confesses to feeling differently now, possibly hinting at his burgeoning passion for racing. When discussing racing for pink slips, Logan asserts confidently that legends don't require trophies to prove themselves.
Back at the garage, Cate's frustration mounts as she discovers a generic part among the car's components. Insisting on authenticity, she tasks Curtis with finding the invoice. As they search, Curtis stumbles upon a clue potentially linking to Christian. A number scrawled on a card prompts Cate to dial it, only to abruptly end the call when panic sets in. With Curtis offering support, Cate decides to call again. The call is swiftly terminated by a woman on the other end upon learning Cate's identity as Christian Maddox's daughter.
Bursting with excitement, Cate shares the discovery of the postcard with Logan and the boys. However, her elation is short-lived when Logan reveals a box filled with similar postcards, remnants of his own fruitless searches for his father's whereabouts. These leads had always ended in disappointment. Cate is crushed, but the boys remain by her side until she eventually allows them to leave for the night, comforted by their presence if not by the outcome.
Logan engages Zac in a heartfelt conversation about racing for Ray, revealing that after mentoring Christian, he was convinced it would be their passport out of Ironwood, envisioning a dominant duo conquering the racing scene. However, his dreams were shattered when Christian's life was derailed by unsavory associations, leading to a tragic loss. Determined not to lose Zac in a similar manner, Logan warns him that Ray is not the mentor he should emulate, vowing to guide Zac on the right path.
Later, at the diner, Curtis extends an invitation to Brooke, hoping to reschedule a ride he had earlier canceled. Marcel generously offers to cover his shift, allowing Brooke the freedom to join Curtis. Meanwhile, Alicia and Harris share an intimate moment tarnished by Harris's revelation; he can no longer see Alicia with the same admiration since his father bought his racing credentials.
Elsewhere, Logan confronts Ray with a stern warning, cautioning him against exploiting Zac. Ray retorts that Zac owes him a car, but Logan firmly reminds him that Zac had already secured Ray a victory the previous night. As Logan issues his threat, he feels a resurgence of his old, fierce self—a persona he claims to have never truly known.
The episode concludes with an emotional exchange between Zac and Cate, who reflect on their late father. Cate expresses her desire to restore their father's car meticulously, believing it embodies their father's spirit, with the first engine revvival echoing his voice. Zac shares his own sentiment, asserting that he senses their father's presence whenever he's behind the wheel.
In a poignant flashback, young Logan and Christian dream about Christian's post-racing life, envisioning a tranquil existence by a lake, where they'd settle down and raise a family. Christian fondly recalls a family trip to Spider Lake in Michigan, a place so enchanting that they never wanted to leave.
