When Tess hears Lydia Green is moving back to the village, she is full of excitement.

As teenagers, Tess and Lydia were inseparable. Until the end of that last summer when Lydia suddenly moved away.

With the recent loss of her husband and two small children to care for, Tess could really use the support of her old best friend. It feels like a bright spot of light in such a difficult time. Like fate has brought Lydia back to her.

But when Tess sees Lydia for the first time in decades, in front of all the other mums at Saturday sport, Lydia pretends not to know her.

Tess can't believe Lydia would lie to her face in front of the whole village, or that she seems to want nothing to do with her.

Is Lydia playing some kind of twisted game? Or did Tess not really know her best friend as well as she once thought...