Set to a Mexican ballad, it is the love story of Chronos and a mortal girl, depicting the joy and agitation of an unresolved romance through the vicissitudes of time and the actions of destiny. Two lovers in an ever-changing dreamlike landscape, filled with the rich, intriguing and often incomprehensible surrealistic imagery of Salvador Dali. It has many of his well-familiar symbols, such as the soft melting watches, indicating the fluidity and relativity of time; ants that signifiy death, decay and also sexual desire; crutches that denote the inadequacy of mankind and their constant need for support etc. The meaning of Dali's symbol's springs from his life and his subconscious associations, which makes them difficult to make sense of; nonetheless, even when the symbols are incomprehensible, they do not fail to evoke distinct impressions, forcing the viewers to make sense of it from their own subconscious projections. In the words of the creators: Dali says that “It is a magical exposition of the problem of life in the labyrinth of time,” while Walt explains that it is really “just a simple story about a young girl in search of her real love.”

More on Dali's symbolism here and here.

For more information on the historical collaboration between Walt Disney and Salvador Dali, read this.