Windy does not drink to forget. He just likes being drunk. Especially at school.
Chatty should not be in the English army. But he is. Which is akward when you are a lifelong hypochrondriac.
Windy is in love with Wendy, his second cousin once removed. But then so is Boswell, his third cousin once removed.
The living should be easy for two aristocrats at the turn of the 20th Century.
Instead, they must help a deranged Headmaster with his scientifically dubious experiments, negotiate the terror of trench warfare and deal with the unwelcome advances of a certain German officer.
But then cross-dressing is never, really, a good idea...