Ana turns 30 on New Year’s Day with life still to be resolved: she lives in a shared apartment, she doesn’t like her work, she lives between new friendships… Óscar turns 30 on New Year’s Eve with life almost resolved: vocational doctor, faithful friends, mortgage and a relationship that comes and goes. But the night the two of them turn 30, they meet, fall in love and begin a relationship whose coming and going will last ten years.