Under the Same Moon () is a 2007 Mexican-American drama film in Spanish and English directed by Patricia Riggen (in her feature film directorial debut) and starring Kate del Castillo, Adrián Alonso, and Eugenio Derbez.

Plot

The film tells the story of Rosario, a single mother who crossed the US/Mexican border, leaving behind her son, Carlitos. As a part of their weekly calls, Rosario describes the area around the payphone to Carlitos in detail. Meanwhile, Carlitos lives in his hometown with his ill grandmother. On the day of his ninth birthday party, his aunt and uncle try to take custody of him to take the money Rosario sends to him every month. His Grandmother turns down their offer and assures Carlitos that she will keep him with her. Later the same night, she dies in her sleep.

Under the Same Moon

Soon after his grandmother dies, Carlitos finds the coyotes and pays them to get him across the border, using money he had saved over the years from both his mother's payments and his part-time job. After crossing the border, the coyotes are stopped for other offenses (several hundred dollars in unpaid parking tickets and expired tags), and their car is towed away with Carlitos still inside. At night, Carlitos escapes the vehicle and runs off but unwittingly drops his money.

Under the Same Moon

Carlitos reaches a bus station but can't buy a ticket because he is too young. Carlitos asks a man if he could buy him a ticket. Carlitos then realizes that he has lost his money. He offers the man $100 to drive him to the impound lot. When they arrive at the impound lot, Carlitos can't find the money. The man, upset, tries to sell Carlitos to a pimp. A local woman, Reyna witnesses the exchange and takes Carlitos to live and work with other undocumented immigrants, but not before scolding the men and throwing money at the man who had attempted to sell Carlitos. The next day, while working, immigration police raid the building and arrest most of the workers. Carlitos and another worker named Enrique, who does not like Carlitos, escape.

Under the Same Moon

Carlitos begins to follow Enrique as he leaves the farm. Enrique tells him to leave him alone and that he doesn't want to watch over him and not to follow him. Carlitos follows him anyway, and the two eventually end up hitchhiking to the city limits of Tucson. When they get out of the van, Enrique yells at Carlitos again for following him and tells the boy to go, so Carlitos begins to walk off in anger on his own. Enrique sees that some men are about to jump Carlitos to try and steal his backpack, and decides to save Carlitos.

Carlitos manages to gain employment for both Enrique and himself at the restaurant. While at the restaurant, Carlitos looks up his absent father, Oscar Aguilar Pons, and they meet. Oscar agrees to take Carlitos to Rosario, but later doesn't show, apparently having changed his mind, angering Carlitos. Enrique decides to take Carlitos to Los Angeles. The two take a bus ride and reach LA.

Carlitos and Enrique arrive in East LA at the address, only to find a PO box. Carlitos and Enrique decide to search the city for the payphone her mother calls from. After a day of unsuccessful searching, the two rest on a bench.

Then, Doña Carmen calls Rosario, letting her know that Carlitos crossed the border and that her mother is dead. Rosario decides to go back to Mexico to search for Carlitos, believing him to be deported, as she thinks Carlitos has no idea where to find her. When boarding the bus she sees a little boy at a payphone out the window of the bus at the bus station, and she realizes that Carlitos does know where to find her.

In the morning, Enrique and Carlitos get surprised by a pair of police officers, and Enrique, noticing that Carlitos is about to be apprehended, throws his coffee at the cops to distract them. Enrique shouts to Carlitos to run away, which he is able to do, but Enrique is arrested, sacrificing his freedom.

Carlitos finally finds the payphone. They see each other across the street. Rosario yells to her son not to cross yet. The crosswalk light turns from the "red hand" light to the “white figure walking" light, indicating that Carlitos and his mom will finally reunite.