It's Mary's birthday, and the islanders throw her a beach party. Carolyn is suffering from post-natal depression. Robbie has decided to leave the island, but Abby and Kenny intercede.
Gordon discovers a mysterious girl adrift in a rowing boat. Abby's relationship with Kenny comes under unwelcome pressure, thanks to Carolyn and Douglas.
Abby's relationship with Alistair is progressing, so she suggests Kenny move out. Meanwhile, Damien arrives on the island and demands Abby pay him the money she owes.