After three years together, Luna and Lode find the passion in their stable relationship rapidly fizzling out. When a magnetic encounter at work leaves Luna craving something more, she proposes an unexpected solution: abandoning monogamy to explore an open relationship. Though intended to save their connection, the decision thrusts both partners into a volatile landscape of jealousy and unexpected intimacy. As Luna dives into the Brussels dating scene and Lode struggles to cope with the new rules, the radical shift ripples outward, pulling their tight-knit group of friends out of their comfort zones and forcing everyone to question the true cost of chasing absolute freedom.