Jo Frost, a modern day, tough-love "Mary Poppins" is placed with families in need of guidance or care. She spends an extended period of time with a family, observing their issues and then, using a series of her own tried-and-true methods, offer solutions.
The families featured this season are from cities and towns around the country, each of the families are dealing with diverse issues that span the spectrum of parenting challenges - from dealing with postpartum depression to kids obsessed with electronic devices.
Working parents Jessica and CJ Braido feel they're being overrun by their four small children and are at a loss at how to come together on their parenting perspectives; the only thing they can agree on is using electronics as a babysitting device.
The Corrys are a military family struggling to discipline their four daughters; while Ben is away with the Army for months at a time, Maria is left dealing with their rambunctious children and navigating her postpartum depression.
Brittany's children from her first husband struggle with the passing of their father, which causes friction between them and their stepfather. Nanny Jo helps the family cope with the loss of a loved one and come together as a blended family.
The Ostlers struggle to control their two rambunctious boys while also still grieving the loss of their first child; Dane's occupation as a firefighter often leaves his anxiety-ridden wife, Nicole, on her own with the boys.
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Stay-at-home dad Anthony Garcia struggles to understand his new role as the primary caregiver, while mom Bethanie can't find her work-life balance; the children rule the roost amid all the confusion and the parents are at their wits' end.
After their children are diagnosed with life-threatening food allergies, Dan and Miranda Andersen are constantly on guard for their family's safety; too much unsupervised screen time makes the bedtime routine a nightmare.
Kristi is overwhelmed and frustrated having to discipline her three girls while her husband, Diarmid, timidly passes the buck. Kristi resorts to yelling in order to gain control, and now her aggressive behaviour is being mimicked by daughter Karina.
Crystal Tobeck and Jeff Lawrence meet, double their family and get a second chance at love; the honeymoon is soon over as rebellious children clash with controlling parents and leave everything in chaos.
Heather and Todd think Hawaii will be the ideal location to raise their triplet boys, and even fly in grandma to help; trouble strikes paradise as the triplets grow into wild, screaming toddlers and the parents become polarized.
After spending 15 years struggling to conceive, Jennifer and Tim adopt twin girls, Mekenna and Alyssa. The twins' boisterous behaviour creates anxiety and animosity between Jennifer and Tim as they clash over how to best raise their children.
Ian and Jamie Orr are at their wits' end with their four rambunctious children. Their oldest son, Julian, is addicted to violent video games and has nightmares, while all four children are picky eaters and demand fried, unhealthy meals.
Michael and Angela Brown combine two beds so that their sons can sleep with them, but this unusual situation creates unhealthy attachment issues; Jo Frost works closely with the full-time working dad and stay-at-home mum to address the problem.
Joe and Clarissa are on the brink of divorce; Joe's new career as a police officer causes Clarissa to deal with four rambunctious kids, leaving Clarissa feeling isolated.
Christina and Katie Bailey have two toddler girls who have a hard time with sharing, and tensions are high as one child picked Katie as their favourite mum, leaving Christina feeling isolated and resentful.
The Beans struggle to balance their complicated work schedules, four kids and their love life; working the graveyard shift sometimes has David awake for 24 hours, taking care of the children and leaving no time to connect with his wife, Nina.
Mealtimes are disastrous for full-time working parents Angela and Dom Zampogna, whose three children have the pickiest palettes and will only consume unhealthy foods, causing them to act up and throw temper tantrums.
A mum feels overwhelmed by her children and the dad won't help because he's busy with video games.
Justin and Amy are overwhelmed and exhausted while trying to manage separate schedules for their children, who are all under 4 years old.