Every day at sunset, Grug gathers his tribe and together they retreat to the safety of a dark cave. Thanks to him, the Croods are the only family which has survived the terrors of the wild.

"Darkness brings death," Grug teaches his brood. "Fear keeps us alive. Never not be afraid. Curiosity kills."

But inquisitiveness gets the better of Eep, who wanders off one night, intrigued by a flickering light in the distance. It leads her to a stranger named Guy (voice of Ryan Reynolds). Guy is an orphan who has survived through sheer resourcefulness — and the discovery of fire.

Eep is enchanted by the hunky lad. (Who knew Neanderthals had abs of steel?) But Guy predicts doom and gloom unless the Croods follow his lead to a safe haven he calls "Tomorrow." Grug is suspicious, and resents relinquishing his role as guardian.

When the earth quakes and volcanoes erupt, the Croods have no choice but to join Guy on the ultimate road trip toward their destiny. Awash in psychedelic colors, the many otherworldly landscapes they encounter are reminiscent of James Cameron's "Avatar."

Whether intentional or not, "The Croods" carries an intriguing Christian subtext. The characters of the title live in fear in the dark. Guy arrives and persuades them to "live in the light" and "follow the sun." Doing so will lead to a kind of salvation as well as a renewal of the bonds of family and friendship.

The Catholic News Service classification is A-I –– general patronage. The Motion Picture Association of America rating is PG –– parental guidance suggested. Some material may not be suitable for children.

McAleer is a guest reviewer for Catholic News Service.