Lucía is a vlogger whose life depends on other people's opinions, and especially that of Maura, her mother, who watches over her all day. When Lucía's sister announces her engagement, her mother begins to worry about Lucía's appearance and emotional stability, betting that she will attend the wedding alone, dressed in black and heavier than ever. Lucía will have 258 days to lose weight, change her image and find a boyfriend. The bet with her mother goes viral and throughout the story Lucía shares the events of each blind date.