Lia is over the moon because her friends have been invited to join her family in celebrating her mum's fortieth birthday in a secret location. It's going to be the party of the decade and Lia envisages romantic scenes in an exotic location with her boyfriend, Squidge. However, events don't go exactly as planned, and the final guest list is full of surprises. Lia finds herself in an awkward position when an old flame turns up and makes a play for her. It's midsummer, but does it mean meltdown for Lia and Squidge when the party's over?