Synopsis：Grace, a struggling lingerie designer desperate to pay for her sister’s life-saving surgery, applies for a job at Chris’s company but is mistaken for an intimacy product tester and pulled into a heated “training” session. When the misunderstanding is revealed, Chris—intrigued by her—offers a lucrative BDSM contract. Cornered by her sister’s critical condition, Grace reluctantly signs, stepping into a world of seductive control and perilous desire while fighting for her family’s future.