An architect witnesses a brutal murder in a small Texas town.

US merchant sailor Alex Walker is stranded in Mexico, penniless and wanted by the police. He meets and joins up with an unlikely couple - ageing but likeable shit Phillip Mills and young sexy, frustated wife Missy. The three develop a curiously inter-dependent relationship. Meanwhile, Police Captain Diaz and Detective Ortega are closing in and the plot circle is closed at Tapachula rail station amidst a stack of mistakes and wrong decisions.

Meredith Stone, a home care nurse, has been assigned the duty of looking after a wealthy invalid named Ivar Langrock. Cooped up in Langrock's stately country mansion, Meredith quickly suspects that someone sinister is lurking in the manor's dark halls only to discover that Ivar's demented and violent son has been locked away in a hidden room. Shortly thereafter, Ivar's grandson Gabriel also moves into the house and with his arrival a mysterious killer soon begins murdering members of the Langrock family along with their live-in staff.