In this Mexican version of "Cinderella", Leetle Senorella's "strapmother" won't let her go to Prince Don Jose Miguel's big fiesta, but her fairy godmother comes through with a gorgeous wardrobe and a beautiful "transporte" drawn by a team of mules (formerly cockroaches). The heroine and Prince Don Jose tango the night away, but at midnight Senorella vammooses, leaving her glass huarache (a Mexican sandal) behind. Ay, caramba! This was the last cartoon produced by the old Warner Bros. animation studio--and the first one with the "modernistic" Warner Bros.-Seven Arts opening titles and reorchestrated theme music.
by Hal Erickson synopsis