The central couple makes all the wrong moves; they start out marrying for love, but then major life decisions drive a wedge between them. They grow violent toward one another and then grow apart. They rarely talk or work together try to solve these problems, and eventually their path leads to much darker places.
Three (possible) murders are shown to varying degrees. Some happen totally off-screen, while one involves a gun and blood oozing from the back of the victim's head. Another victim is beaten to death but not shown. There are bloody clues pointing to the murders. Also occasional arguments and fits of rage; in one scene, the husband grabs his wife and drags her by the hair. She turns up with a black eye in another scene. Discussion of a past suicide.
The married couple flirts, kisses, seduces each other, and has sex. Nudity is limited to a shower scene in which breasts are visible in silhouette.
Infrequent use of "f--k" and "motherf----r." Also "a--hole."
The characters regularly smoke cigarettes and pot and snort coke. They also drink quite often in a social context, i.e. beer and wine at dinner or harder drinks at parties.