Sarah (Winslet) is a suburban outsider who, unlike the other playground moms, isn't afraid to approach the dreamy but long-absent father whom smitten housewives have taken to calling the "Prom King." Long days at the local community pool with their respective children soon find Sarah becoming acquainted with local husband and father Brad (Patrick Wilson) — who seems to share in her seething discontentment with life in their quaint commuter town. An English literature major who never envisioned a fate as a soccer mom, Sarah has a growing dissatisfaction with her successful husband (Gregg Edelman) that parallels Brad's increasing frustration with his inability to pass the bar and connect with his wife, Kathy (Jennifer Connelly), a successful documentary filmmaker. It's not long before the dejected pair is meeting for a series of illicit afternoon trysts as their unsuspecting spouses work and their children lie quietly napping. Later, after the community is riled by the return of a convicted sex offender (Jackie Earle Haley) who leaves the concerned parents scrambling to protect their young ones, an attempt made by Sarah and Brad to legitimize their clandestine relationship by dining together with their respective spouses goes tragically awry.

1. Snack Time (1:11)
2. Tissue (:52)
3. 2 Hillcrest (:47)
4. Late Hit (1:12)
5. Bandshell (2:05)
6. Red Bathing Suit (2:03)
7. Lucy (1:46)
8. It's wrong and it's weird (2:33)
9. Pool Days (1:49)
10. Weekends were difficult (1:47)
11. What's the Hurry? (3:31)
12. Fly me to the Moon (2:35)
13. Mae (1:08)
14. A Sniff or two (1:42)
15. Torso (1:10)
16. Be a good Boy (1:41)
17. Slutty Kay (:42)
18. Little Children (1:18)
19. End Title (7:40)