Sixty-year-old Frances Pia lives alone on a thirty-foot sailboat anchored near Sausalito, where she communes with the fog, sea lions, cormorants, and two sailor friends, Otto and Russell. She performs random acts of public defacement - painting drainpipes, public restrooms, and murals on the sides of houses - which she believes are beautification projects, and struggles with bouts of depression and mania. Frankly, she's a bit of a nutcase. But Frances wasn't always this way. She was once a Catholic nun with a sister, Anne, who loved her dearly. But then she slept with her brother-in-law, Greg - and ashamed and pregnant, she fled, leaving Anne, her art, and her vocation behind. When she also lost her baby, Nicola, in a freak accident, she lost faith in God and became a keeper of sorrows. Through a series of wacky adventures, including bouts with the cops and the sea, Frances opens her heart to love for the first time in years - and begins to really paint the town, redeeming herself with Anne and freeing herself from her guilt over Nicola's death along the way.