The summer camp, which the girlfriends dreamed of, became the place where they quarreled. Lucia is confused, because soon the filming of a fashionable clothing advertisement will take place, in the casting of which her friends won at the beginning of the summer. Will the girls be able to reconcile in order not to fail the filming? But will they find Bea's lost violin in the subway, without which she will not be able to play an important concert at the end of the summer? Read already in the third part.