踩踏天坛LynnandLucyarelife-longbestfriends,theirrelationshipasintenseasanyromance.Neitherhasventuredfarfromwheretheygrewup.Lynn,whomarriedherfirstboyfriendandwhosedaughterisfastgrowingup,isdelightedwhenthecharismatic,volatileLucyhasherfirstbabyboy.Lucy,howeverdoesnotreacttobeingamotherasLynnexpects.Soon,theyfindtheirfriendshipistestedinextremecircumstances.