When a school is held captive by the man responsible for the death of his sister, a doctor has visions of a lost childhood revealing the secret between his sister and the man that now threatens his daughter’s life.

So close I can taste it. You have definitely given me something to work with.

Thanks.

"A grieving Doctor must examine his past when a psychopath holds his daughter's school hostage, he knows better than most what this man's capable of........"

Thought I'd try to return the favour! Hope this helps x

Still confusing. Because of the sequence of the words it first sounds like the man killed his own sister and is no threatening to kill his own daughter. I know that's not what you meant, but If I read this logline i'd assume the writer doesn't know how to tell a story... no matter how good a story it might be.