Timeless Love [Back to the Future Fanfic]

In 1985, in Hill Valley, California, Isabelle Carter navigated a life of uncertainties. As a childhood friend of Marty McFly, Isabelle is no stranger to life's twists. She grew up in the foster care system, burdened by her foster parents' cruel remarks about her appearance. Her only solace lies in a heart-shaped necklace left by her biological mother, a mysterious gift she has been instructed to open only when necessary.

Isabelle's life takes a thrilling turn when Marty, disheartened by his family's troubles and failed music audition, has her introduce him to Doc Brown, a quirky scientist to whom she grew close. He reveals to them an incredible invention-the time machine built from a DeLorean. A sudden attack by terrorists forces Isabelle and Marty to flee, inadvertently sending them back to November 5, 1955.

Stranded in the past without the means to return, Isabelle and Marty discover a magnificent family estate linked to Isabelle's mysterious necklace. Adopting the identities of Isabelle and Martin Ellsworth, they embark on an adventure to fit into the 1950s and navigate their way back to the future. Isabelle quickly befriends a young Lorraine Baines, Marty's future mother, while Marty encounters his teenage father, George, and the relentless bully, Biff Tannen.

As Isabelle finds herself in the crosshairs of Biff's arrogance, an unexpected connection sparks between them. What begins as a clash of wills soon evolves into something more, as Isabelle and Biff's lives become intertwined in ways neither could have foreseen.