After Josh and Fola are reunited with their respective partners, things get complicated when Fola's husband Zack offers his new neighbours an invitation to their house-warming party. Josh's girlfriend Esther happily accepts, leaving Josh extremely stressed.

After another aborted attempt at sex with Fola, Zack impulsively buys some Viagra at the chemists and bumps into Esther. After their prescriptions get mixed up, Zack is embarrassed when he realises that Esther will discover what he's bought…