By Catholic News Service

The nuptials turn nasty as this potentially enjoyable comedy from director Jake Szymanski departs from its initial promise as a conversion story and instead follows an all-too-familiar path to the gutter.

Fed up with their misbehavior and womanizing at social events, the family of two hard-partying brothers (Zac Efron and Adam Devine) insist they bring dates to their younger sister’s (Sugar Lyn Beard) destination wedding in Hawaii, hoping that such companionship will stabilize them. But the duo of apparently nice girls (Anna Kendrick and Aubrey Plaza) the lads eventually end up with, after posting an ad on Craigslist, are not what they seem, and mild mayhem ensues.

Through it all, the four main characters supposedly mature. Yet the vaguely fact-based film, adapted from a 2015 memoir by Mike and Dave Stangle, slides in the opposite direction, seeking to reap laughs from recreational pill popping, bizarre sex acts and situations made awkward by their violation of the incest taboo.

Strong sexual content including graphic premarital and aberrant activity as well as full nudity; much sexual humor, some of it concerning a bisexual character; occasional irreverence; benignly viewed drug use; about a dozen uses of profanity, pervasive rough and crude language.

The Catholic News Service classification is O — morally offensive. The Motion Picture Association of America rating is R — restricted. Under 17 requires accompanying parent or adult guardian.

Click here for full reviews of this and other current movies by Catholic News Service.