Following a break-up from his long-suffering girlfriend Dee, Arthur puts his future on hold to move back home with his widowed mother, Maggie.

Maggie tries to inspire a visit from her grandchildren, while Robbie seeks a sperm donation from Arthur for her friends, a lesbian couple.

Maggie keeps going missing, leaving Arthur and Robbie to get creative in their attempts to keep track of her so Arthur can go on a date. Arthur meets Maya, whose family has taken over the dance studio that Maggie frequents.

Arthur battles with his identity when Maggie takes in a Ghanaian lodger at her house. Maggie and her new 'son' decide to run a Ghanaian food stall at the local markets. Arthur helps Dee pack for her move to Canberra.

Arthur and Maggie both engage in sexual misadventures with disastrous results. Maggie is horrified to learn that Leo's restaurant has been leased. Robbie tries to convince Maggie to sign over her Power of Attorney.

Maggie and Arthur aren't speaking to each other after Arthur finds out Maggie's plans to take her health into her own hands. Maya and Arthur grow closer when Arthur agrees to review the new restaurant.

Arthur is determined not to take Maggie to Canberra with him to visit his ex, Dee, but Maggie has other plans. Maggie fears she is becoming 'invisible'. Arthur comes to terms with the nature of his relationship with Dee.

Arthur is concerned that Maggie's friend Heather may be a bad influence. Robbie's marriage faces a crisis after Arthur unwittingly gets involved. Maggie and Heather cause chaos at Tony and Maya's new restaurant.