The ‘Quinceañera’ celebration is a lived illusion. A daydream shared by the whole community of Tetlanohcan, a rapidly urbanising agricultural town in Tlaxcala, Central Mexico. The dream is shared even by those living and working in the USA. 'Tiempo de Vals' mixes observational footage and testimonials from three generations of women to analyse the meaning of the celebration in the context of the massive social and economic changes in this part of Mexico over the last 40 years.