Nick Ackerman's life is an aimless circuit between his uninspiring job and the local bar until a note from a stranger changes everything. He learns he has a 14-year-old son, Billy, whose grandmother can no longer look after him. Railroaded into fatherhood, Nick takes in the resentful Billy and shuffles Grandma Evie off to the nearby dementia ward at Prairie View Manor. Things get off to a rocky start: father and son are little more than strangers, and Nick struggles with his new caretaking role while Billy can't seem to let go of his. Luckily, there is Sarah, a housekeeper in the dementia ward and the single mother of an energetic and offbeat five-year-old. It is Sarah who Nick turns to as a parental role model and maybe something more.

Nick, Sarah, and Billy all carry their own betrayals and disappointments and are used to keeping others at a distance, but during the dog days of summer, they are given a chance to leave past hurts behind and find a new kind of family.

Compassionate and closely observed, Cattail Lane is a moving exploration of forgiveness, second chances, and the everyday moments where we might find our way to one another.