A big blowout forces the residents to finally come face to face and resolve their differences. But just as the mood shifts to euphoric highs, tragedy strikes and there's a mighty fall. As intense divides form and unlikely bonds are made, the residents must work together - and a death in camp leaves the holiday-makers grappling with their guilt and searching for someone to blame.

Annie's past is laid bare as the Campbells confront their future. Becky's risky pursuit of Gavin reveals his true colours.

The picture-perfect Henderson family try to escape their past at Summerwater, but Becky and Alex go down dangerous paths. 

As pressure mounts, Alina retraces the journey that led her family to Summerwater, where their lives will change forever.

David puts pressure on Annie and the couple find themselves in crisis. Past betrayals and unbearable futures are laid out, and a choice must be made. Josh's attempts to seal the bond of his relationship with Millie backfire and instead shine a light on their differences.

As officials arrive to investigate, Justine Tindall attempts to hide something devastating. With frustrations rising and her family's every move closely observed, the shocking past that haunts them is slowly brought to light.