Drama following a woman who moves into a seemingly happy and content community, but is ultimately murdered by someone living close by. The series begins with Jan's death, before reverting back to the day she moves in, slowly leading viewers down the path to her mysterious death.

Huw is convinced that Jan is an undercover police officer, much to the annoyance of his wife Caroline. Gruff, meanwhile, becomes increasingly concerned about the prospect of a half-naked image of him appearing on the internet, and Richard and Sali continue to play little games within their soulless marriage. Richard pays more attention to his new neighbour, and Jack's 18th birthday party proves an ideal time for the residents to meet, mingle and fall out.

Betty pushes Ben to worm his way into Jan's house by starting a new relationship, but he expresses little interest. Meanwhile, Huw continues to worry about the drugs he has hidden in the woods and becomes convinced that Jan has moved onto the close just to spy on him.

Someone on the close dies unexpectedly and mourners gather to pay their respects. Meanwhile, Jan returns from her work trip and is shocked to discover her house has been broken into. As Richard and Sali's relationship continues to deteriorate, Jan plants more seeds of doubt in Cerian's mind.

Jan's neighbours make it clear they want her to leave the Close, and an unexpected visitor forces her to divulge more about her past than she is comfortable with. Meanwhile, Ben tries to persuade Beti to get help from a doctor following a bout of troubling behaviour.