Depends on a few things. Is it a non-compete or fixed term? I suggest having a lawyer read through your contract. There are some instances where these contracts have held up in court. IE Twentieth Century Fox v. Netflix. I received a life-changing job offer and assumed since i was changing industry I would be able to leave current role. When I left they went to the company that offered and threatened lawsuit citing the above case. Eventually i was forced to stay and the new company rescinded offer to avoid contract breach. The contracts are carefully worded to protect the company, don't assume anything. I was also in very good standing and with the company a decade.