All Souls Day, or All Souls Day Dia de los Muertos, is a 2005 zombie film written by Mark A. Altman and directed by Jeremy Kasten. It premiered at the 2005 Slamdance Film Festival, and the Sci Fi Channel played it on June 11, 2005. There is also an uncut version on DVD.
Years later, a college couple vacationing in Mexico comes across the town, empty of people. After accidentally running into what appears to be a funeral procession, they uncover the deadly truth of the towns past. Every year on the Day of the Dead a human sacrifice is presented at the local church to appease the spirits of the towns original inhabitants however, this year the couple interferes with their sacrifice. With nothing to appease the dead, they return to kill the transgressors.Calling two of their friends for help, the four are left to fight off the growing hordes of the undead besieging their hotel, while trying to uncover the secrets hiding within the hotels rooms. ........
Source: Wikipedia