This is all about Poppy, played by Sally Hawkins. Single in London. Positive, cheerful, and generally embodies the title of the movie. Every situation is to be faced with good spirit, a light attitude, and cheer. 
At the beginning it seems that she will overrun a challenge like a tank running over a building in a WW II flick. Smiles. Banter. Humor. Irrepressible. Even when alone. 

The challenges grow. A problem student. A vagrant in a deserted part of town. A doctor visit. A dance instructor with issues. 

 

 

 

 

 

How Poppy reacts to each challenge - and how others react to Poppy - is the core of this movie. The plot is mostly a string of episodes. Mike Leigh does an outstanding job directing, finding a second level to each situation. Funny and happy. But also thoughtful and a little gritty. 

Sally Hawkins should be up for an Oscar in 2009, but that is a whole other discussion.