Dylan must contact all the girls he has slept with to inform them he has chlamydia. He casts his mind back to Abigail and a flashback reveals a defining moment he'd tried to forget...

In a flashback to 10 months earlier, Luke drags Dylan and Evie to a posh party in the country. Luke is desperate to sleep with his childhood crush Ilona, who's on his 'things to do before I die' list.

In a flashback to three years earlier, it's Evie's birthday and she plans to tell Dylan about her feelings for him over a quiet dinner, but the evening gets hijacked by their friends.

The day after Angus's divorce party, Abigail won't answer Dylan's calls. He, Luke and Evie try to piece together what happened the night before.