My Brother's Keeper (2014)

Two brothers, Gregor and Pietschi, couldn’t be more different. Gregor, a dedicated doctor with a stable marriage, contrasts sharply with the carefree, womanizing Pietschi. Traditionally, they reunite annually for a weekend of sailing, but this year, Pietschi vanishes without a trace. While Gregor continues his routine, he grows increasingly perplexed by his brother's absence and embarks on a quest to uncover the truth about Pietschi's life. As Gregor delves deeper into the mystery, he becomes consumed by the shadows of his brother's existence, questioning his own identity in the process.