Blending smart fantasy elements, broad comedy, tender romance and an atypically slow-burning apocalypse, the directorial debut of “I Heart Huckabees” co-writer Jeff Baena is charming, thoughtful and laugh-out-loud funny.

Sometimes tender, sometimes frantic and always funny, the film's surprising coherence is exemplified in a climactic scene that pairs credible heartbreak with pure slapstick.

The premise would make for a great Funny or Die video, but stretched out to feature length, it runs out of ideas pretty quickly. Still, Plaza is terrific. She commits so fully to her rabid, Romero-esque alter ego, she chews the movie up.

Baena takes a well-tread road, leaving behind the guts of his promising story and never capitalizing on the charms of either romance or his leading lady.

There’s social satire for those who want it — don’t tell the rest of the neighborhood our daughter’s risen from the dead! — and a fine, simmering sense of apocalypse that turns this suburban community into a war zone. Still, it’s a lot of heavy lifting for what amounts to “he’s just not that into you,” mainly because you’re as ripe as a cadaver.