One day Lisette finds a pretty green sock. She's delighted, until some bullies begin to tease her: socks should come in pairs; what use is one sock? Lisette searches and searches, but she cannot find the sock's missing mate. Fortunately, her friend Bert helps her see the situation in a new way. And together they come upon the perfect solution in this ingenious story about how socks, like friends, don't have to come in pairs.