Is social media a waste of time, as David Remnick said? Maybe so. But Twitter, Instagram and the rest make keeping up with other people's lives easy and free. Where the Cannes festivalgoer is concerned, a spur-of-the-moment video on Instagram by a filmmaker can potentially add insight into what they're experiencing. At the same time, it's important not to lose touch of the fact that social media is often as vapid as it is useless

Sentaro (Nagase Matasoshi) runs a small bakery that serves dorayakis, Japanese pastries filled with sweet red bean paste called “an”. When an old lady, Tokue (Kiki Kirin), offers to help in the kitchen he reluctantly accepts. But Tokue proves to be quite skilled at making “an." Thanks to a recipe she's taken half a century to perfect, the dorayaki counter takes off. But not everything is coming up roses. Tokue's past slowly comes into view, an old affliction that will have a serious impact on their newfound success.