Act One takes place in 1959 in a white-neighborhood home that's being sold to a black family. Act Two takes place in that same home 50 years later when it is now in a primarily African-American neighorhood and being sold to a white, gentrification-minded couple. In both cases, the attitude from the neighbors is "there goes the neighborhood".
The play has great dialogue and characters and acting and is a good evening of theater. All of the actors in Act One play totally different types of characters in Act Two, making for a wide acting range for each.
Clybourne Park won the Pulitzer in 2011. This 2013 Guthrie production is outstanding..