It is the last week of the school year.  The children and their teacher, Mrs Osmond, are thinking about the changes ahead whilst preparing for their leavers’ concert, a musical celebration of friendship.

To their surprise, the children discover that they are not the only ones having to be brave about big changes ahead when their teacher announces that she too is moving on, to retirement. 

The children are intrigued when Mr Silvers, the mysterious caretaker, reads Mrs Osmond’s tea leaves and predicts a big celebration in the near future, involving, but not for the children.

Perhaps more wise for their years than they should be, the children soon realise that the  last thing Mrs Osmond wants to do is retire. More importantly they have worked out the reason why.

Next, there seems to be a reversal of roles as Mrs Osmond finds herself no longer in charge of her class as the children take control and sort out her future, but with time against them, will their plan succeed before the end of the concert?