Penny, a former actress, has returned to her childhood countryside home, where she rekindled a relationship with her school friend Rory, now the local GP. Together with old friends, Penny has created community groups like DAFT (Downtime and Fun Time) for young mothers and carers, providing a space for connection and support. Additionally, Home Buddies helps isolated individuals forge new friendships. Mum on a Swing continues the heartwarming story of life in the valley, as Penny navigates the joys and challenges of motherhood and discovers the true meaning of family and community.