This is the true story.

委系实情。

《新英汉大辞典》

This is the true story of a bank robber. But this robber didn't burst into the bank with a gun and grab cash from a frightened teller.

这是一个有关银行劫匪的真实故事，但这名劫匪并没有持枪闯入银行，把出纳员吓得魂不附体，然后抢夺金钱。

youdao

The cold, hard cruelty of two young men is vividly brought to life in this true story.

两个年轻人的冷漠和残忍在这个真实的故事里被生动地表现了出来。

《柯林斯英汉双解大词典》

This is not quite true nor is it the whole story.

BBC: What hope for Middle East peace?

This is a true story: The hot shot was basking in his success a little too grandly at the end of a major customer conference event.

FORBES: Sometimes, Silence is Golden

But the true story is this community's unbending resilience.

WHITEHOUSE: President Obama Holds Town Hall in New Orleans