联系紧密的一家人中的儿子交了新女友，母亲随后发现自己之前见过这个女子，“她的思想很激进”，并因此对父亲表达了担忧，但家人并未在意，随后，疯狂的变化发生了。

　　Season 4 will pick up a full year after the events of Season 3, and business couldn’t be better at the Wild/Reid Detective Agency as Harry and Fergus welcome an unexpected client: Charlie Wild.　　Elsewhere, Harry is hired by a friend and former wild child turned nun; Lola stumbles upon a dance school myster; a Dublin literary tour takes a bloody turn; and Fergus’ hopes of going to college at the same time as Lola are threatened when she gets an incredible offer to study abroad.

Single-mother Sandra (Clare Dunne) escapes her abusive partner with her two young children, only to find herself trapped in temporary accommodation. After months of struggling, she draws inspiration from one of her daughter’s bedtime stories and hits upon the idea of self-building an affordable home. She finds an architect who provides her with plans and is offered land by Peggy (Harriet Walter), a woman she cleans for. Aido (Conleth Hill), a building contractor, appears willing to help too. But as her past rears its head, in the form of Gary (Ian Lloyd Anderson), her possessive ex, and as bureaucrats fight back against her independent spirit, will Sandra be able to rebuild her life from the ground up