The firefighter Erik wants to make a proposal to his girlfriend Sofie, but at the crucial moment sparkles the attractive Melissa in between. When Sofie learns that Erik had a fleeting affair with Melissa on Carnival, a world collapses for her. But the two gather again, as Erik promises high and holy that such a thing will never happen again. To underline the seriousness of his intentions, he makes her an unconventional offer: he "gives" her an infidelity. He should not have done that, because suddenly he threatens to lose Sofie to his best friend.

A line-puller at the soccer stadium, apparently once an active footballer himself, breaks out in his chalk car and is confounded to discover that lines play an important role not only in his job.