加里和瑪麗的宇宙碰撞，現實裡他們的汽車相撞，這是命運的力量。然而當他們開始變得親密時，瑪麗卻突然消失了。

加里偶遇了瑪麗，追問她為什麼要逃離。其實瑪麗自身抱有一些加里難以理解的問題。

瑪麗走出地下室，面對驚恐的加里。似乎有來自宇宙的訊息想要告訴他們什麼，可加里卻逃跑了。

在第二次汽車追尾事故後，瑪麗邀請艾瑪共進晚餐，瑪麗答應了她的要求。但她其實很擔心加里會揭穿她的秘密。

加里和瑪麗終於成為幸福的一家人。然而，新問題出現了。這讓他們的生活變得更為複雜。

他們在澳大利亞的荒郊陷入了汽車拋錨的困境，眼看著月圓之夜即將降臨。為了避免自己體內的狼人傷害加里和艾瑪，瑪麗奔跑著離去

Mary and Gary wonder if they can ever be “normal parents” when they need to werewolf-proof their basement. On top of their existing parenthood worries, they’re concerned about the species of their future baby.

Things could get hairy as a full moon approaches. Mary must transform while heavily pregnant, testing the limits of the new basement door. As a precaution, Emma spends the night at her aunt’s house.

The wolf didn’t attack Emma and Gary while they were in the car in the outback and doesn’t recognize them during a rampage through the house. When Gary meets a normal woman, the mother of Emma’s new best friend, Mary gives him an easy out.

Mary’s former professor Anton shows up, threatening the precarious balance and revealing something that complicates things even further. As a second full moon rises, Mary contemplates letting her wolf run free while stuck in the basement with Anton.

In the aftermath of Mary and Anton’s brief but significant encounter as wolves, Gary confronts his rival. Gary thinks it’s a sign from the universe when he crashes into who he thinks is the same person who fatefully brought him and Mary together.

At the eight-month mark, Gary has the birth plan mapped out and all the couple needs is zero stress until after the full moon. When the cops call asking questions about a double homicide, Mary’s water breaks.

A maternity ward is the worst possible place for Mary to be on a full moon. When an emergency C-section is ordered and the cops show up, there’s no other option for Mary, Gary and their imminent baby or wolf but to run.