Knives Out (2019)

Wealthy crime novelist Harlan Thrombey invites his family for his birthday party. The next morning, he is found dead. Private detective Benoit Blanc is hired to investigate. He discovers that Harlan's family had been alienated and had motives for killing him. However, it is revealed that Harlan's nurse Marta was responsible for his death accidentally. The family turns against Marta, but she is aided by Ransom, Harlan's grandson. As the investigation unfolds, it is revealed that Ransom planned to frame Marta for the murder. In the end, Marta is proven innocent and inherits Harlan's fortunes.