One day, Gina discovers that she can see something others can't: a thin strand of red thread that extends from a person's ring finger, connecting them to another person's ring finger. Their lover, their soulmate. Problem is, that's what Gina can see for couples who have already tied the knot. For others, their string flows down to a sea of red on the ground, tangled. As for Gina, her red strand just fades and vanishes a few centimetres from her finger.